EP4409927A2 - Système de haut-parleurs, circuit de commande pour un système de haut-parleurs comprenant un haut-parleur d'aigus et deux haut-parleurs moyens ou de graves et procédés correspondants - Google Patents

Système de haut-parleurs, circuit de commande pour un système de haut-parleurs comprenant un haut-parleur d'aigus et deux haut-parleurs moyens ou de graves et procédés correspondants

Info

Publication number
EP4409927A2
EP4409927A2 EP22777268.8A EP22777268A EP4409927A2 EP 4409927 A2 EP4409927 A2 EP 4409927A2 EP 22777268 A EP22777268 A EP 22777268A EP 4409927 A2 EP4409927 A2 EP 4409927A2
Authority
EP
European Patent Office
Prior art keywords
signal
push
channel
pull
channel signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22777268.8A
Other languages
German (de)
English (en)
Inventor
Klaus Kaetel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaetel Systems GmbH
Original Assignee
Kaetel Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaetel Systems GmbH filed Critical Kaetel Systems GmbH
Publication of EP4409927A2 publication Critical patent/EP4409927A2/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/307—Frequency adjustment, e.g. tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/12—Circuits for transducers for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/021—Transducers or their casings adapted for mounting in or to a wall or ceiling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/03—Reduction of intrinsic noise in microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/01—Input selection or mixing for amplifiers or loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved

Definitions

  • the present invention relates to electroacoustics and in particular to concepts for generating and reproducing audio signals in a room, such as e.g. B. a vehicle or a stationary room, such as a hall, a waiting area, etc.
  • a room such as e.g. B. a vehicle or a stationary room, such as a hall, a waiting area, etc.
  • acoustic scenes are recorded using a set of microphones. Each microphone outputs a microphone signal.
  • a microphone signal For example, for an orchestral audio scene, 25 microphones may be used.
  • a sound engineer performs a mixing of the 25 microphone output signals into, for example, a standard format such as a stereo format, a 5.1, a 7.1, a 7.2, or other appropriate format.
  • a stereo format for example, two stereo channels are created by the sound engineer or an automatic mixing process.
  • a 5.1 format the mixing results in five channels and one subwoofer channel.
  • a mix is made into seven channels and two subwoofer channels.
  • a mixed result is fed to electrodynamic loudspeakers.
  • two speakers exist, with the first speaker receiving the first stereo channel and the second speaker receiving the second stereo channel.
  • a 7.2 playback format for example, there are seven loudspeakers in predetermined positions and two subwoofers that can be placed relatively arbitrarily. The seven channels are routed to their respective speakers, and the two subwoofer channels are routed to their respective subwoofers.
  • the European patent EP 2692154 B1 describes a set for recording and playing back an audio scene, in which not only the translation is recorded and played back, but also the rotation and also the vibration. Therefore, a sound scene
  • SUBSTITUTE SHEET not only reproduced by a single detection signal or a single mixed signal, but by two detection signals or two mixed signals which are on the one hand recorded simultaneously and on the other hand are reproduced simultaneously. It is thereby achieved that different emission characteristics of the audio scene are recorded in comparison to a standard recording and are reproduced in a reproduction environment.
  • a set of microphones is placed between the acoustic scene and an (imaginary) auditorium to capture the "conventional" or translational signal, which is characterized by high directivity or distinguishes high quality.
  • a second set of microphones is placed above or to the side of the acoustic scene to record a low-Q or low-directivity signal intended to represent the rotation of the sound waves as opposed to translation.
  • corresponding loudspeakers are placed in the typical standard positions, each of which has an omnidirectional arrangement to reproduce the rotational signal and a directional arrangement to reproduce the "conventional" translational sound signal.
  • European patent EP 2692144 B1 discloses a loudspeaker for reproducing, on the one hand, the translatory audio signal and, on the other hand, the rotary audio signal.
  • the loudspeaker thus has an omnidirectionally emitting arrangement on the one hand and a directionally emitting arrangement on the other hand.
  • European Patent EP 2692151 B1 discloses an electret microphone that can be used to record the omnidirectional or the directional signal.
  • European patent EP 3061262 B1 discloses an earphone and a method for producing an earphone that generates both a translatory sound field and a rotary sound field.
  • the European patent EP 3061266 B1 discloses a headphone and a method for producing a headphone which is designed to generate the "conventional" translational sound signal using a first transducer, and using a second transducer arranged perpendicularly to the first transducer to generate the to generate a rotary sound field.
  • the recording and playback of the rotational sound field in addition to the translational sound field leads to a significantly improved and thus high-quality audio signal perception, which almost conveys the impression of a live concert, although the audio signal is played back through loudspeakers or headphones or earphones.
  • the disadvantage of the concept described is that the recording of the additional signal, which reproduces the rotation of the sound field, represents a further outlay.
  • pieces of music be it classical pieces or pop pieces, in which only the conventional translational sound field has been recorded. These pieces are typically still highly compressed in their data rate, such as in accordance with the MP3 standard or the MP4 standard, which contributes to an additional deterioration in quality which, however, is normally only audible to experienced listeners.
  • SUBSTITUTE SHEET (RULE 26) the left and several channels on the right and one channel in the middle. Formats that are even higher use more than five channels in the plane and also channels from above or channels from diagonally above and possibly also, if possible, channels from below.
  • the object of the present invention is to create an improved loudspeaker system and an improved drive circuit as well as an improved method for producing a loudspeaker system and an improved method for driving a drive circuit.
  • a loudspeaker system comprises two mid-range or woofers, which can be controlled separately and have membranes of substantially the same size, and a tweeter.
  • the two midrange drivers or woofers and the tweeter are housed in a loudspeaker system housing, with the tweeter being arranged in the loudspeaker system housing in the same way as the midrange drivers or woofers and being fitted between the two midrange drivers or woofers.
  • This loudspeaker system or loudspeaker module is particularly suitable for an instrument panel or a parcel shelf or for a corresponding surface in a vehicle, but can also be used for the sound reinforcement of stationary rooms.
  • the two mid-range speakers or woofers are designed to provide sound in a vehicle or in a room to be filled with sound, not only with the common-mode signal, i.e. the typical audio channel, which is a left, a right, a left rear, a can be right rear or a center channel provided.
  • the two mid-range or woofers also deliver a push-pull or differential mode (DM) in addition to the in-phase or common mode (CM). In this way, according to the invention, a special sound experience is achieved
  • SUBSTITUTE SHEET (RULE 26) because the loudspeaker module not only generates the common mode but also the push-pull mode and thus not only stimulates translational sound but also rotational sound in the air.
  • the tweeter is placed between the two loudspeakers, on the one hand to create a good use of space in the loudspeaker system housing, and on the other hand to achieve an optimal spatial source for the sound that is excited by the tweeter, to the effect that that the tweeter sound is excited as close as possible to the common mode or the differential mode of the two midrange or woofers.
  • the loudspeaker module is preferably a flat module, in particular for installation in a dashboard or a parcel shelf or another corresponding position in a vehicle, the top side of the loudspeaker system housing having a length or width which is at least twice the height of the loudspeaker cher system housing.
  • the tweeter and the two midrange drivers or woofers each include a membrane that can be deflected essentially perpendicularly to an upper side of the loudspeaker system housing.
  • the two mid-range drivers or woofers and the tweeter are also arranged, but in a preferably upright housing.
  • the two membranes of the midrange or woofer are arranged in such a way that they are parallel and excite the sound in the same direction, i.e. perpendicular to a membrane surface.
  • the tweeter is again preferably arranged between the first and the second membrane and can now be deflected essentially perpendicularly to the two membranes, so that when the three loudspeakers are operated simultaneously, the membrane of the tweeter is essentially perpendicular to the Membranes of the two midrange or woofers vibrate.
  • the speaker modules for the dashboard or the parcel shelf are arranged in different positions, such as left, center or right, depending on the implementation, different combinations with simple speakers that only the common mode signal, i.e. the left channel or the right - radiate the th channel or another channel, but without differential mode.
  • the loudspeaker module according to the invention with conventional loudspeakers, to the effect that the effort for the sound reinforcement can be reduced depending on the requirement or, in the sense of the best possible sound reinforcement result, is kept to a maximum while both left and A loudspeaker module according to the invention is used in the middle and on the right.
  • Both the speaker module for installation in a vehicle and the speaker system, which is designed as a shelf speaker, is preferably driven with a drive circuit that is designed to generate the drive signals for the three elementary speakers, i.e. from at least two channel signals of a multi-channel audio signal to generate the two midrange or woofers and the tweeter.
  • This control circuit is either integrated in the loudspeaker module or in the shelf loudspeaker, or arranged separately from the loudspeaker module or the loudspeaker system housing.
  • the drive circuit In the first case, only the two channel signals of the multi-channel audio signal have to be fed to the loudspeaker system housing, and the drive circuit generates the three drive signals for the individual elementary loudspeakers internally, in the loudspeaker system housing.
  • an amplifier device in the form of a respective individual audio amplifier is preferably also provided in the loudspeaker system housing, for example for each control signal.
  • the drive circuit in which the drive circuit is designed separately, the drive circuit includes an input interface in order to receive the two channel signals.
  • the control circuit is preferably designed as an app, bit or as a hardware element in a mobile device, such as a mobile phone, a tablet, etc.
  • an output interface is provided in order to transmit the control signals, either wirelessly or with a cable, ready conditioned, but preferably not yet amplified, to the loudspeaker system housing, which in turn has an input interface to receive the control signals and which also has an amplifier stage has to amplify the respective drive signals accordingly.
  • a separate arrangement of the amplifier stage outside of the loudspeaker system housing is possible, in which case cables are preferably provided between the amplifier stage and the loudspeaker system housing in order to transmit the amplified control signals to the corresponding elementary loudspeakers, i.e. the tweeter and the midrange or woofer in the supply loudspeaker system housing.
  • cables are preferably provided between the amplifier stage and the loudspeaker system housing in order to transmit the amplified control signals to the corresponding elementary loudspeakers, i.e. the tweeter and the midrange or woofer in the supply loudspeaker system housing.
  • the drive circuit preferably includes a basic push-pull signal generator, a common-mode signal generator, a push-pull signal generator, a mixer and a tweeter signal generator in order to determine the three drive signals.
  • the common-mode signal generator and the tweeter signal generator preferably include a frequency filter in order to generate a low-pass signal from the original signal
  • the push-pull signal generator comprises a further frequency filter in order to generate a high-pass signal and a low-pass signal, with the high-pass signal not being filtered further spectrally in the push-pull signal generator.
  • the low-pass signal is preferably fed to a spectral interleaving device in order to achieve spectral interleaving such that the low-frequency components emitted by the two mid-range or woofers do not cancel each other out.
  • spectral interleaving in the two control signals relative to each other is achieved by the spectral interleaving device, but limited to the low-frequency range, since the high-pass range of the control signal for the midrange or woofer is optimally radiated due to the geometry of the midrange or woofer and therefore none extinction in the sound transmission medium is to be expected.
  • the spectral filtering does not necessarily have to be carried out in the push-pull signal generator. Then the entire push-pull signal, which includes the low-pass range of the basic push-pull signal, is subjected to spectral interleaving.
  • the signal for the tweeter is not processed with regard to push-pull signal processing.
  • the signal emitted by the tweeter will be a pure common-mode signal, which, depending on the implementation, can be supplemented by an appropriately amplified or attenuated differential signal component.
  • the two midrange or woofers stimulate the common mode and the push-pull or differential mode simultaneously in the sound transmission medium due to the activation according to the invention, which leads to the excellent sound quality perceived in the room to be covered.
  • the device according to the invention also includes an interface for transmitting the control signals.
  • the interface can be wired or wireless and, depending on the implementation, can already include a power amplifier or not.
  • the interface can also carry out further measures for the control signals, such as equalizer processing of the signals
  • SUBSTITUTE SHEET (RULE 26) or source coding of the signals or source coding and transmitter processing of the signals to convert the signals e.g. B. wirelessly using a wireless protocol, such as Bluetooth or DECT, to an input interface of a loudspeaker module, which then typically also has a power amplifier.
  • a wireless protocol such as Bluetooth or DECT
  • the present invention is based on the finding that already by generating a first and a second push-pull signal, both of which are derived from the first channel signal, the second channel signal or from both channel signals, a differential wave field around the two mid-range or woofer loudspeakers and therefore for a person who is exposed to sound from the loudspeakers, which, in addition to the translational sound that is emitted by the loudspeakers, also represents the rotary sound, which leads to a very significant improvement in the quality of the subjective audio perception.
  • the differential wave field is generated in that the control signals for the loudspeakers are correspondingly supplied with signals that have a phase difference from one another, this phase difference preferably being 180°, but in one
  • the range can be between 160° and 200°, with almost the same effect being obtained as when the signals have the preferably best phase shift of 180°.
  • the effect of the differential wave field is all the better, the closer the first and second mid-range or low-frequency loudspeakers are arranged to one another.
  • the loudspeakers should preferably be at least 10 cm apart and no more than 1 m apart, with distances in the range of 20 cm (e.g. 15 to 30 cm) being preferred.
  • the relatively close spatial arrangement of the two loudspeakers means that no separate sound generators are required to generate the differential wave field. Instead, it is sufficient that the two midrange or low-frequency loudspeakers receive the special control signals according to the invention.
  • Only one channel signal ie either the left channel signal or the right channel signal, can be used to generate the control signals.
  • a sum of the two channel signals i.e. a mono signal, can be used.
  • the calculation of the basic push-pull signal is based on taking a difference between the two channel signals that tends to dominate the basic push-pull signal or the push-pull signals or mixed signals. Depending on the implementation, this difference can be used directly or can be combined with a sum signal
  • SUBSTITUTE SHEET (RULE 26) be combined, or can be combined with the left channel signa! or combined with the right channel signal.
  • the difference signal! to be used alone to calculate the basic push-pull signal or the mixed signals, or the difference signal combined with the sum signal from the two channels, with the proportion of the difference signal and the proportion of the sum signal being adjustable in the final push-pull signals or mixed signals, and is preferably adjusted in such a way that the difference signal determines at least 2/3 of the two push-pull signals or mixed signals with regard to the corresponding energy in the signals.
  • the speakers are preferably installed in a room, such as a B. an interior in a vehicle, such as. B. a land vehicle (car, train, sleigh, motor vehicle, ...), an aircraft ("passenger” aircraft, helicopter, zeppelin, etc.), a watercraft (ship, ferry, yacht, sailing ship, etc.), or built into a spacecraft.
  • a vehicle such as. B. a land vehicle (car, train, sleigh, motor vehicle, ...), an aircraft (“passenger” aircraft, helicopter, zeppelin, etc.), a watercraft (ship, ferry, yacht, sailing ship, etc.), or built into a spacecraft.
  • the two midrange or woofer speakers generate differential sound wave fields. These can be generated via an oscillating surface (planar transducer) or via two adjacent piston transducers (loudspeakers) vibrating in push-pull or other transducers described. As a source signa! Mono and/or differential signals (L-R or R-L) can be used to generate the differential sound wave field.
  • a synthetic generation of the rotation signal is possible if an audio piece with more than one channel, i.e. already with two stereo channels, for example, or even more channels, exists.
  • at least one approximation to the difference signal or rotation signal is obtained according to the invention, which can then be used to control the corresponding loudspeakers together with the respective channel signal.
  • a calculation of two mixed signals, which have a phase difference to one another, is carried out from the differential signal.
  • control signal generator is equipped with a down-converter for the first channel signal, ie, e.g. B. for the left channel, and another down mixer for the second channel signal, ie for the right channel upstream.
  • the signal is present as an original microphone signal, such as an ambisonics signal with
  • each down-converter is designed to calculate a left or right channel from the Ambisonics signal, which is then used by the control signal generator to calculate the control signals.
  • the loudspeakers are arranged separately from the driving circuit or the driving signal generator.
  • the loudspeaker systems have signal inputs that can be wired or wireless, with a signal for a sound generator in the loudspeaker being generated at each signal input.
  • the control signal generator which supplies the control signals for the sound generators, is arranged remotely from the actual loudspeaker and is connected to the loudspeakers via a communication link, such as a wired connection or a wireless connection.
  • control signal generator is integrated in the loudspeaker systems or in a loudspeaker or in the vehicle.
  • the common-mode signal and, depending on the implementation and exemplary embodiment, the push-pull signal are derived separately or from the common-mode signal.
  • One aspect of the present invention thus relates to the loudspeaker without a signal processor.
  • Another aspect of the present invention thus also relates to the signal processor without a loudspeaker and a further aspect of the present invention relates to the loudspeaker with an integrated signal processor.
  • control signals are derived from this multi-channel representation when a multi-channel signal is present, for example as a stereo signal or as a signal with three or more channels.
  • a stereo signal for example, a side signal is calculated that represents the difference between the left and right channels, with this side signal then being correspondingly attenuated or amplified, if necessary, and mixed with a non-high-pass filtered or high-pass-filtered common-mode signal, depending on the implementation. If the output signal has multiple channels, the mixed signals can be generated from differences between any two channels of the multi-channel representation.
  • a difference between the left and right rear (right surround) could be generated, or alternatively a difference between the center channel (center channel) and one of the other four channels of a five-channel display.
  • a difference between left and right can also be determined, as with a stereo display, to generate the side signal.
  • SUBSTITUTE SHEET (RULE 26) certain channels of the five-channel display can be added, ie a two-channel downmix can be determined.
  • An example implementation for generating a two-channel downmix signal is to add, optionally with weighting factors, from the left rear (left surround), left and center to generate a left downmix channel.
  • the channel on the right rear (right surround) is added to the right channel and the center channel again, if necessary with weighting factors.
  • the mixed signals can then be determined based on a difference between the left downmix channel and the right downmix channel.
  • a device for generating control signals for a sound generator or the loudspeaker system comprises a push-pull signal generator for generating a push-pull signal from a first channel signal and a second channel signal of a multi-channel audio signal, and a common-mode signal generator for generating a first common-mode signal from the first channel signal or a second common-mode signal from the second channel signal, the device being designed to generate one or more control signals for one or more mid-tone or bass-tone converters of the sound generator using the first common-mode signal or the second common-mode signal and using the push-pull signal generate, and wherein the device is designed to generate a further control signal for a tweeter of the sound generator using the first common mode signal or the second common mode signal and using the push-pull signal, or wherein the device is designed to generate the control signals to use band-selective processing in a low-frequency range in order to use the push-pull signal and the common-mode signal for the control of one or more mid-range or low-frequency converters of the
  • a sound generator comprises one or two transducers for a low-frequency or mid-range range and a tweeter, the one or two transducers z. B. are arranged to be deflected in a plane perpendicular to a base and the tweeter z. B. is designed to be deflected perpendicular to a base, or wherein the one or two transducers z. B. are arranged to be deflected in a plane perpendicular to a surface normal of a front side of the sound generator and wherein
  • SUBSTITUTE SHEET (RULE 26) that of the tweeter z. B. is designed to be deflected perpendicular to the deflection of the two transducers.
  • a speaker configuration for an instrument panel or a back shelf in a vehicle includes a sound generator as above at a left position, a sound generator as above at a middle position, and a sound generator as above at a right position, or a sound generator with a transducer at a left position, a sounder as above at a middle position, and a sounder with a transducer at a right position, or a sounder as above at a left position, and a sounder as above at a right position, or a sound generator as above at a left position, a sound generator with a transducer at a middle position, and a sound generator as above at a right position.
  • FIG. 1 shows a loudspeaker module for a dashboard, a parcel shelf, etc., or a loudspeaker module according to an exemplary embodiment with a separate tweeter;
  • FIG. 2 shows various configurations for installing loudspeakers in a dashboard, a parcel shelf or another surface in a vehicle and an overview of configurations of loudspeaker modules at various positions in a vehicle for modules from FIG. 1 with tweeters and CM (Common Mode) and DM (Differential Mode) control according to a further embodiment;
  • FIG. 3 shows a front view and a side view in schematic form (with a transparent housing) of a shelf loudspeaker or a loudspeaker module according to a further exemplary embodiment with a separate tweeter;
  • FIG. 4 shows an implementation of three loudspeaker modules in a dashboard of a vehicle or a concept for sound supply in the vehicle in front of the driver's seats, e.g. B. for speakers between the windscreen and the dashboard in the upper border of the dashboard;
  • SUBSTITUTE SHEET (RULE 26) 5 shows a schematic arrangement of control signal, amplifier stage and loudspeaker system or as well as a control circuit or algorithm for the various loudspeakers, each of which has two individual loudspeakers and a tweeter preferably arranged between them;
  • FIG. 7 shows a schematic representation of the control circuit integrated in the loudspeaker system housing or separately from the loudspeaker system housing;
  • FIG. 8a shows a preferred implementation of the push-pull signal generator with phase shifters at the input of the push-pull signal generator
  • Figure 8b shows an alternative preferred implementation of the push-pull signal generator with phase shifters at the output of the push-pull signal generator
  • 8c shows a schematic implementation of the spectral interleaver with overlapping pass/stop bands
  • 8d shows a schematic representation of the frequency transfer functions of both elements of the spectral interleaver and a schematic representation of the two different pluralities of bandpass filters, respectively;
  • 8e shows an alternative implementation of the spectral interleaving device with odd-numbered and even-numbered band-pass filters or a further schematic representation of band-pass filters that are interleaved or interlocked or interlaced with one another, divided into odd-numbered and even-numbered band-pass filters;
  • FIG. 9 shows a preferred implementation of the control circuit with a downstream amplifier stage and a loudspeaker system for left-hand or right-hand installation or a control circuit or algorithm for the various loudspeakers, each of which has two individual loudspeakers and one preferably arranged in between have tweeters;
  • SUBSTITUTE SHEET (RULE 26) 10 shows a control circuit with an amplifier stage and the loudspeaker system for installation as a center loudspeaker or a control circuit or algorithm for the various loudspeakers, each of which has two individual loudspeakers and a tweeter preferably arranged in between;
  • FIG. 11 shows a preferred embodiment of the two drive circuits for a first speaker system for left-hand installation and a second speaker system for right-hand installation with additional regulation of the basic push-pull signal via a controlled amplifier or a schematic representation of an integrated or not integrated implementation of the signal generation with a side-signal generator as an example of a push-pull signal generator and nested bandpass filters in the various signal paths according to an embodiment for driving loudspeaker modules of FIGS. 1-5 or other loudspeaker modules with two converters and a tweeter;
  • Fig. 12 shows an implementation of a loudspeaker system with drive circuit, regulated or controlled amplifier and an additional use of the high-pass component of the differential signal for the tweeter drive signal and a spectral interleaving device only for the low-pass component of the basic push-pull signal or a schematic representation of an integrated or non-integrated implementation of Signal generation with a side signal generator as an example of a push-pull signal generator and nested bandpasses in the various signal paths according to a further exemplary embodiment for driving speaker modules of FIGS. 1-5 or other speaker modules with two converters and a tweeter;
  • FIG. 13 shows an embodiment similar to FIG. 12, but with the alternative implementation of the basic push-pull signal generator according to the principle shown in FIG. 8b;
  • FIG. 14 shows a more detailed representation of the implementation of the controlled or regulated amplifier of FIGS. 11 to 13 depending on a similarity of the two channel signals, on a property of the raw push-pull signal or on externally supplied metadata.
  • SUBSTITUTE SHEET (RULE 26) 1 shows a loudspeaker system with a tweeter 130, 230, two mid-range or woofers 110, 210 or 120, 220, which can be controlled separately, and a loudspeaker system housing 140, 240.
  • the tweeter 130, 230 and the two mid-range drivers or woofers 110, 210 and 120, 220 are arranged in the loudspeaker system housing, with the tweeter 130, 230 in particular being arranged between the two mid-range drivers or woofers 110, 210, as is shown in Fig. 1 you can see.
  • the arrangement between the two midrange or woofers is not directly where the smallest distance between the two midrange or woofers is, but slightly offset to the outside.
  • the placement of the tweeter is carried out between the two mid-range drivers or woofers.
  • the listener thus perceives the emission of the tweeter in the same spatial position as the emission of the woofer.
  • the woofers and midrange drivers emit the "normal" common-mode signal, e.g. B. the left audio signal when the speaker system in Fig. 1 is shown for a left speaker. Because this audio signal is emitted by two individual transducers, the sound signal is stronger than if it were emitted by a single transducer, so smaller transducers are sufficient to produce the same sound pressure in the air and ultimately the same loudness to the listener.
  • the two midrange drivers or woofers emit not only the common-mode signal, but also the push-pull signal.
  • This push-pull signal causes the sound that is excited to be not only common-mode sound, but also the push-pull component that leads to differential-mode sound in the air.
  • the speaker system cabinet is a flat cabinet in which a top of the speaker system cabinet has a length or width or a diameter at least two times greater than a height of the speaker system cabinet. Stronger ratios to the extent that the shape is very flat, to the extent that not only double is achieved by length or width or diameter, but is at least five times
  • the tweeter and the two midrange or woofers each include a membrane that can be deflected essentially perpendicularly to a surface of the loudspeaker system housing, as shown in FIG.
  • the membranes are thus z. B. deflected parallel to the upper side with respect to its central area, where corresponding schematic movement vectors are drawn in in FIG. 1, if the upper side has a flat shape.
  • the membrane of the tweeter is laid out in the same direction.
  • a speaker system as shown in Figure 1 is required to play a left audio channel. Then the loudspeaker system is arranged at a left-hand point with respect to a listener's position, for example with respect to a sweet spot in a reproduction room. The same speaker system is also placed at the right position, so that when there is a left and a right speaker system, a total of six diaphragms work. If a center speaker or a surround speaker is also provided on the left or right, i.e. all five positions of a 5.1 scenario are provided with a speaker system, then five speaker systems with a total of 15 individual membranes are used.
  • the loudspeaker module is in the form of a flat cassette with an oval-like shape in which the short diameter is between 8 cm and 12 cm and preferably about 10 cm and the long diameter is between 13 cm and 17 cm and preferably about 15 cm . This is also the area for the single diameter of a circular shaped module.
  • a membrane diameter of a midrange speaker or woofer is between 4 and 8 cm and preferably between 5 and 6 cm.
  • a membrane diameter of the tweeter is between 1.5 and 5 cm and preferably between 2.5 and 3.5 cm, and in one embodiment approximately 3 cm.
  • the height of the module is between 3 and 10 cm and preferably between 4 and 6 cm and most preferably around 5 cm.
  • the dimensions of 15 cm for the long diameter, 10 cm for the short diameter, 5 cm for the height and membrane diameters between 5 and 6 cm correspond to the preferred cut-off frequency for spectral interleaving of 200 Hz
  • Midrange and woofers can be used with smaller cut-off frequencies and, for smaller dimensions, the midrange and
  • the loudspeaker system housing is preferably closed or acoustically closed on the underside and on the side and the top in which the three membrane sound generators are installed. In other designs, the loudspeaker module can also be circular or have a polygonal shape.
  • the loudspeaker system housing has a cuboid or cylindrical upright shape, with the two mid-range drivers or woofers each having a membrane, and with the first membrane of a first mid-range driver or woofer parallel to a second membrane of a second mid-range driver or woofer and in the Loudspeaker system cabinets extending from top to bottom are arranged as shown in Fig. 3 in the left picture showing a front plan view and in Fig. 3 in the right picture showing a side plan view of the bookshelf loudspeaker.
  • the tweeter is again arranged between the first and the second membrane, as shown in FIG. 3 and, in contrast to FIG. 1, however, can now be deflected essentially perpendicularly to the first and the second membrane.
  • the schematic representation shown in FIG. 3 is such that the loudspeaker system housing is drawn transparent to a certain extent. It can again have a cuboid shape or a cylindrical shape, depending on the design.
  • the bookshelf speaker has a front direction that can be aligned to an area to be covered.
  • the first and second diaphragms are arranged essentially parallel to the front direction and can be deflected essentially perpendicularly to this front direction, with a front side of the loudspeaker system housing being essentially perpendicular to the front direction when the front side has a flat shape, or has at least one area that is essentially perpendicular to the front direction when the front side z.
  • B. is curved. Then there is a region of curvature that has a directional vector that is perpendicular to the deflection of the two membranes.
  • the vehicle can be any vehicle on water, air or land or in space.
  • SUBSTITUTE SHEET (RULE 26) Version A shows a maximally equipped configuration, in which a loudspeaker system is arranged both in the left position and in the right position and in the middle (center) position, as is shown schematically.
  • the loudspeaker system housing of each individual loudspeaker module from FIG. 1 does not have to be completely closed. Instead, it can only be designed in such a way that it carries the individual membranes to one another, and an outer wall to the front represents the parcel shelf or the dashboard, and a limitation downwards is also provided, with this limitation, however, covering all three speaker systems can record.
  • Version B shows a version with a reduced effort, in which only the middle loudspeaker system is designed in order to be able to use the Common Mode as well as the Differentia! To emit mode, while the two loudspeaker systems on the left and right side have only a single midrange or woofer, which only emits the common mode signal or the common mode.
  • Version C shows an implementation without a center loudspeaker, in which a loudspeaker system according to the present invention is arranged only on the left side and the right side, which emits the common mode as well as the differential mode in the mid and low frequency range, while the tweeter only due to the fact that it only works with a single transducer, only a common mode signal! emitted.
  • a loudspeaker system according to the present invention is arranged only on the left side and the right side, which emits the common mode as well as the differential mode in the mid and low frequency range, while the tweeter only due to the fact that it only works with a single transducer, only a common mode signal! emitted.
  • just emitting the common-mode signal is sufficient for the good sound quality of the present invention, and that an additional design of the tweeter also with a common-mode signal does not lead to any significant improvement in sound quality, which is why the the effort required for this can be saved compared to if two tweeters were also used for the high-frequency range.
  • Version D shows a further implementation, in which the configuration chosen in version C, but in which a simple sound transducer is provided in addition to supporting the center signal, in order to transmit the center signal, which is typically a mono signal, which obtained by adding left and right, or which is present separately in the multi-channel audio signal.
  • FIG. 4 shows a further implementation, particularly of version A of FIG
  • SUBSTITUTE SHEET (RULE 26) which additionally a windshield of a vehicle, such as a motor vehicle, is indicated.
  • FIG. 5 shows the loudspeaker system, indicated with respect to the loudspeaker system housing 140, 150, 240 together with an amplifier stage 600 for amplifying the drive signals for the three sound transducers and a drive circuit 500, which consists of a first channel signal and a second channel signal, ie z . B. from the left channel and the right channel of a multi-channel audio signal, which generates three control signals for the tweeter and the two mid-range or woofers.
  • This drive circuit is indicated in its entirety in FIG. 5 by reference number 500, also as a computing algorithm.
  • the implementation can be in software, in hardware, or in a mixed software/hardware implementation, depending on the embodiment.
  • z as
  • the drive circuit 500 can be implemented separately, resulting in the drive circuit 500' in FIG. B. is implemented in a mobile device. Then the first channel signal and the second channel signal are fed into the spatially separate control circuit 500' and this outputs the three control signals for the three sound transducers in the loudspeaker system. This output is wireless or wired, depending on the embodiment. If, on the other hand, the control circuit 500 is implemented directly in the loudspeaker system housing 140, 150, 240, i.e. in close proximity to the mid-range speaker or woofer, to the tweeter and to the further mid-range speaker or woofer, then the drive circuit also uses the first channel signal and the receive second channel signal.
  • the loudspeaker system also includes the amplifier stage 600 from FIG is.
  • the drive circuit 500' is spatially separated from the loudspeaker system
  • the loudspeaker system comprises only one input interface in order to receive the three drive signals.
  • the control signals are amplified in the loudspeaker system housing, which will be necessary in particular if the wireless transmission of the control signals from the spatially separate control circuit to the loudspeaker system takes place.
  • the amplifiers in the amplifier stage will also need a power supply. If, on the other hand, the transmission takes place by wire or cable from the spatially separate control circuit to the loudspeakers, the loudspeaker modules themselves do not require their own
  • the drive circuit includes a first input 501a for a first channel signal of a multi-channel audio signal and a second input 501b for a second channel signal of the multi-channel audio signal. Furthermore, a first output 502a is provided for a first control signal for the first mid-range speaker or woofer. In addition, a second output 502b is provided for a second control signal for the second mid-range speaker or woofer. Finally, a third output 502c is also provided for a third control signal for the tweeter.
  • the drive circuit also includes a basic push-pull signal generator 510 for forming a basic push-pull signal from the first channel signal at the first input and the second channel signal at the second input.
  • a common-mode signal generator 520 is provided for generating a common-mode signal from the first channel signal or the second channel signal or both channel signals for the first control signal and the second control signal.
  • the drive circuit includes a push-pull signal generator for generating a first push-pull signal and a second push-pull signal from the basic push-pull signal at the output of block 510, the first push-pull signal being phase-shifted with respect to the second push-pull signal.
  • a mixer is also provided in order to mix the common mode signal with the first push-pull signal in order to obtain the first drive signal, and to mix the common mode signal with the second push-pull signal in order to obtain the second drive signal.
  • the control circuit includes a tweeter signal generator 550 for generating the third control signal from the first channel signal or the second channel signal or from both channel signals, depending on the design of the loudspeaker. If the loudspeaker is designed as a left loudspeaker, then the common-mode signal generation 520 and the tweeter signal generation work on the basis of the first or left channel signal, as will be explained with reference to FIG. If, on the other hand, the loudspeaker system is arranged at the right reproduction position of a reproduction scenario, then the common mode signal generator 520 and the tweeter signal generator 550 work with the second or right channel signal. If, on the other hand, the loudspeaker system is designed for a middle channel, i.e. for the middle reproduction position, as shown with reference to FIG both signals can be formed in blocks 520 and 550, respectively.
  • exemplary embodiments for driving the loudspeaker module from FIG. 1 or the shelf loudspeaker from FIG the tweeter undergoes spectral nesting.
  • only the low-pass range of the basic push-pull signal (before the phase shift) or of two mutually phase-shifted basic push-pull signals is subjected to spectral interleaving, while the higher frequency range of the drive signal for the midrange or woofers is not subjected to spectral interleaving , but is routed directly to the two midrange or woofers in order to generate a non-spectrally filtered push-pull signal.
  • Spectral interleaving in the low frequency range ensures that the two push-pull signals, although out of phase with each other, do not cancel each other out in the air. This could happen if the transducers of the midrange or woofers are not large enough or not sufficiently spaced. Since there are constructive limits here, it is therefore preferred to carry out a corresponding spectral interleaving of the first push-pull signal with respect to the second push-pull signal in the low-pass range, which is obtained by the frequency filter 532, as is also shown with reference to FIGS. 8d, 8e.
  • spectral interleaving performed to ensure that a sufficiently strong push-pull component is also perceived, which is also important for the perception of the push-pull component.
  • the spectral interleaving device thus makes it possible to achieve good perception of the push-pull component even in the range in which the structural conditions of the loudspeaker system are actually no longer optimal.
  • the basic push-pull signal which has been generated by the basic push-pull signal generator 510 in Fig. 6, is supplied to the phase shifter 531, which is designed to shift the basic push-pull signal by a first phase value. to obtain a first phase-shifted signal, and to shift the basic push-pull signal by a second phase value to obtain a second phase-shifted signal, the second value being different from the first value.
  • Both phase shift values are preferably the same, but with different signs and in particular preferably the same size 90° for the first phase value and ⁇ 90° for the second phase value.
  • alternative values can also be used as long as the two values are different.
  • the quality is all the better if the first phase value and the second phase value are the same in absolute terms, but have different signs.
  • the best results are obtained when the two phase values are around 90° or lie in a range from 60° to 120° and have different signs.
  • an asymmetrical phase shift can also be carried out by the phase shifter, to the effect that the first phase value z. B. is -60 ° and the second phase value is 120 °, also lead to good results, since in particular a phase difference between the first phase-shifted signal and the second phase-shifted signal of 180 ° or in a range between 150 ° and 210° is preferred.
  • a frequency filter 532 is connected downstream of the phase shifter 531 and is designed to filter both the first phase-shifted signal in order to obtain a first high-pass signal and a first low-pass signal. Furthermore, the frequency filter 532 is designed to filter the second phase-shifted signal with regard to its frequency in order to obtain a second low-pass signal and a second high-pass signal.
  • the two low-pass signals generated by the frequency filter 532 are fed to the spectral interleaver 533, which applies a first spectral filter to the first low-pass signal and a second spectral filter to the second low-pass signal, to that effect that the output signals of the spectral interleaver 533 differ from each other.
  • the signals preferably differ in that both signals have frequency components that are complementary to one another, ie that the first spectral filter attenuates in a range in which the second spectral filter has a passband and vice versa. It does not necessarily have to be that the first spectral filter completely attenuates in a range in which the spectral filter has a passband. Instead, it is only sufficient that a certain attenuation is achieved, such as at least 3 dB and preferably at least 6 dB in terms of signal power.
  • bandpass filters are sufficient for the first spectral filtering and the second spectral filtering, to the effect that a bandpass filter for the first low-pass signal has an attenuation of 6 dB in a spectral range in which the second spectral filter has a bandpass that has a passband here and has little or no attenuation.
  • the mixer 540 is designed to determine the first control signal from the first high-pass signal with the first filtered signal and the common-mode signal, with the mixer 540 also being designed to obtaining the second drive signal from the second high-pass signal, the second filtered signal at the output of the spectral interleaver and the common-mode signal.
  • the first filtered low-pass signal and the first high-pass signal can also be combined in order to obtain the complete first push-pull signal before it is then fed into the mixer 540.
  • the mixer combines the first high-pass signal and the common-mode signal (GLTS) together with the filtered low-pass component as a somewhat incomplete first push-pull signal in a combiner, such as an adder stage, a filter bank stage or another corresponding element .
  • a combiner such as an adder stage, a filter bank stage or another corresponding element .
  • the frequency filter 534 is applied directly to the basic push-pull signal in order to obtain a low-pass signal and a high-pass signal.
  • the low-pass signal is fed to the spectral interleaver 535 to obtain two spectrally interleaved or filtered signals. These are then each combined with one and the same high-pass signal in the combiner 536 in order to obtain the two push-pull signals that have not yet been phase-shifted at the output of the combiner 536 .
  • These are then correspondingly phase-shifted in a downstream phase shifter 531 in order to obtain the complete push-pull signals, i.e. the first and the second push-pull signal, at the output of the phase shifter 531, which are then fed into the mixer 540 in order to be combined accordingly with the common-mode signal to become.
  • the spectral interleaver 8c shows a preferred implementation of the spectral interleaver in that it has a first or more first bandpass filters 533a, 535a.
  • the second filter preferably comprises one or more second bandpass filters as shown at 533b, 535b.
  • the spectral interleaver already receives two different signals, namely the first low-pass signal and the second low-pass signal or, if the spectral interleaver is applied to the entire frequency range of the basic push-pull signal, the complete correspondingly phase-shifted basic push-pull signal shifted with the first phase value and the corresponding basic push-pull signal shifted with the second phase value.
  • the spectral interleaving device receives two different signals which either only have the lower frequency range or the corresponding upper frequency range.
  • the spectral interleaver receives a single signal which is present in both the one or more
  • SUBSTITUTE SHEET (RULE 26) first bandpass filter 533a, 535a and in the one or more second bandpass filters 533b, 535b is fed, which is shown in Fig. 8b by a branching point of the input signal shown in dashed lines.
  • the pass bands of the corresponding filters are shown schematically in FIG. 8c.
  • the one or more first band-pass filters preferably include a first low-pass signal 320a or a first band-pass signal which, however, has the same bandwidth as the first low-pass filter.
  • the one or more second band-pass filters then includes a second band-pass signal, which, however, can also be a high-pass signal in the minimum configuration.
  • the simplest embodiment of the spectral interleaving device would be an embodiment of the first spectral filter 533a, 535a with a first low-pass filter and the second spectral filter 533b, 535b with a second high-pass filter to the left of the dashed line.
  • An improved implementation includes at least a second pair of filters in the first spectral filter and the second spectral filter, namely the third bandpass filter 320b and the fourth bandpass filter 340b.
  • the second bandpass filter 340a will be in the form of a bandpass and not a highpass.
  • a fifth bandpass filter 320c is provided and a sixth bandpass filter, which is not shown in FIG. 8c and is correspondingly arranged in the passband.
  • the basic push-pull signal can be obtained from the side signal of mid-side signal processing, which can then be used directly or delayed or, depending on the implementation can be attenuated or amplified.
  • SUBSTITUTE SHEET (RULE 26) Aural impression leads in comparison to an embodiment in which the two sound generators are only controlled with a common mode signal and work in common mode.
  • a first plurality of bandpass filters 533a, 535a is provided in the push-pull signal generator for the upper signal path, and a second plurality of bandpass filters is provided for the lower signal path 533b, 535b provided.
  • the two bandpass filter implementations 320a,b,c, 340a,b of Figure 8c differ from each other as shown schematically in Figure 8d.
  • the bandpass filter with the center frequency f 1 which is shown at 320a in FIG the center frequency f5 belong to the first plurality of band-pass filters 320 and are therefore arranged in the first signal path 321, while the band-pass filters 340a, 340b with the center frequencies f2 and f4 are arranged in the lower signal path 341, ie to the second plurality of bandpass filters.
  • the bandpass filter implementations 320, 340 are thus designed to be nested with one another or interdigital or nested, so that the two signal converters in a sound generator element emit signals with the same overall bandwidth, but differ in that every second band in each signal is attenuated. This means that the separating web can be dispensed with, since the mechanical separation has been replaced by an "electrical" separation.
  • the bandwidths of the individual bandpass filters in FIG. 8d are drawn only schematically. Preferably, the bandwidths increase from bottom to top, in the form of a preferably approximated Bark scale.
  • the entire frequency range is divided into at least 20 bands, so that the first plurality of bandpass filters comprises 10 bands and the second plurality of bandpass filters also comprises 10 bands, which are then superimposed due to the emission of the sound waves. in turn reproduce the entire audio signal.
  • 8e shows a schematic representation to the effect that 2n even-numbered band-pass filters are used in the generation for the upper drive signal, while 2n-1 (odd-numbered band-pass filters) are used for generating the lower drive signal
  • SUBSTITUTE SHEET (RULE 26) become.
  • Other classifications or implementations of the bandpass filter in a digital way for example by means of a filter bank, a critically sampled filter bank, a QMF filter bank or a Fourier transformation of whatever kind or an MDCT implementation with subsequent summary - different processing of the tapes can also be used.
  • the different bands can also have a constant bandwidth from the low end to the high end of the frequency range, for example from 50 to 10,000 Hz or above.
  • the number of bands can also be much larger than 20, such as 40 or 60 bands, such that each plurality of bandpass filters represents half of the total number of bands, such as 30 bands in the case of 60 total bands .
  • odd-numbered band-pass filters are arranged in the upper branch and even-numbered band-pass filters are arranged in the lower branch.
  • even-numbered and odd-numbered band-pass filters can also be reversed, so that the upper signal is further processed with even-numbered band-pass filters.
  • the sequence between the phase shifter 531, which is preferably designed as an all-pass filter, and the (double) filter bank 533 can also be reversed.
  • the all-pass filter 531 can also be dispensed with, since in such a case the filter banks in element 533 already result in the push-pull signals in the upper branch and in the lower branch being different from one another.
  • the embodiment of the loudspeaker system is preferably combined with the push-pull signal generation, in which the two push-pull signals for the two mid-range or woofer sound generators are generated using mutually nested bandpass filters, so that the frequency content of one push-pull signal is essentially nested with the frequency content of the other push-pull signal is.
  • interleaved is only to be understood as roughly interleaved here, because bandpass filters always have overlaps between adjacent channels, since bandpass filters with a very steep edge cannot be implemented or can only be implemented with great effort.
  • a bandpass filter implementation as shown schematically in Fig. 8d, is also regarded as a nested bandpass filter implementation, although there are always areas of overlap between the different bandpass filters, but with regard to the frequency components at the center frequency of the respective bandpass filter, for example are attenuated by at least 6 dB and preferably by at least 10 dB.
  • FIG. 9 shows an embodiment of a loudspeaker system or a control circuit when the signal is used as a left loudspeaker or alternatively as a right loudspeaker.
  • the basic push-pull signal generator 510 comprises an inverter 511 and an adder 512 to generate the basic push-pull signal which is the difference (R-L) for the left channel. If, on the other hand, the speaker is used as a right-hand speaker, the connections for L and R are reversed, as shown on the left in FIG. Then the basic push-pull signal present at the output of the adder 512 represents the difference (L-R). Alternatively, the difference (L-R) can also be selected for the left loudspeaker and the difference (R-L) for the right loudspeaker. It is only preferred that the basic push-pull signal has a different sign for left and right.
  • the push-pull signal generator 530 in FIG. 9 includes the configuration shown in FIG. 8a with a phase shifter connected upstream.
  • a phase shifter element 531a is provided with the first phase value of +90° and a phase shifter element 531b with the second phase value equal to -90°.
  • the frequency filter 532 is designed both in the upper branch to generate the first high-pass signal and the first low-pass signal and to generate the second high-pass signal and the second low-pass signal in the lower branch.
  • Two individual low-pass elements 532a are provided for this purpose and two individual High fitting links 532b.
  • the spectral interleaving device 533 is connected downstream of the low-pass elements 532a.
  • the spectral interleaver includes the first spectral filter 533a and the second spectral filter 533b having pass/stop bands complementary to each other.
  • the outputs of the spectral interleaver and the outputs of the high-pass elements are added separately in order to obtain the complete push-pull signals.
  • the mixer includes the individual adders 540a. The actual addition or mixing of the corresponding push-pull signals with the common-mode signal that has been generated by the common-mode signal generator 520 takes place through the additional adders 540b for the upper and
  • SUBSTITUTE SHEET (RULE 26) the lower branch instead.
  • the spectral nesting or “spectral interlacing” is denoted by S1 in FIG.
  • the common-mode signal generation in the common-mode signal generator 520 takes place in the low-pass filter 521
  • the tweeter signal generation 550 from FIG. 6 takes place in the high-pass filter 556 .
  • 9 also shows that the common mode signal is fed directly to the mixer 540b, and that the tweeter signal, which is also a common mode signal, is also fed directly to the corresponding amplifier of the amplifier stage 600.
  • the two push-pull signals represent indirect signals that are each added to the common-mode signal via the mixer 540b in order to obtain the control signals.
  • the high-pass cut-off frequency for forming the tweeter control signal ie for forming the third control signal, is preferably 4 kHz, but can be in the range between 3 kHz and 5 kHz.
  • the low-pass cut-off frequency of the low-pass filter 521 for forming the common-mode signal 529 is also corresponding to the high-pass cut-off frequency z. B. set at 4 kHz or is in a range of 3 kHz and 5 kHz.
  • the low-pass or high-pass cut-off frequency for the frequency filter 532 in the push-pull signal generator 530 is correspondingly lower, preferably at 200 Hz. Depending on the implementation, however, this frequency can vary between 150 and 500 Hz In the embodiment shown in FIG.
  • FIG. 10 shows an implementation similar to that shown in FIG. 9, but now for driving the center speaker 150 of FIG. 1 or FIG is preferably arranged in the common-mode signal generator 520, the sum of the first channel signal L and the second channel signal R is formed. This sum or mono signal is then fed to the low-pass filter 521 of the common-mode signal generator in order to obtain the common-mode sum signal. In contrast, the sum signal at the output of the adder 522 is high-pass filtered, specifically by the high-pass filter 556, which is preferably part of the tweeter signal generator 550, in order to obtain the third control signal.
  • the push-pull generation by push-pull signal generator 530 takes place in the same manner as illustrated in FIG.
  • SUBSTITUTE SHEET (RULE 26) Also shown in FIG. 10 are mixers 541, 542 which correspond to adders 540b of FIG. Also, adders 543, 544 are shown in FIG. 10 to obtain the full push-pull signals corresponding to adders 540a in FIG. All adder elements, i.e. 540a, 540b, 541, 542, 543, 544 are preferably elements of the mixer 540 of FIG.
  • FIG. 11 shows an alternative implementation of the drive circuit which additionally has the controllable amplifier 1030 . Furthermore, in FIG. 11, in comparison to FIG. 9 or FIG. 220, 230 shown. Furthermore, the control signals for the sound converters 110, 120, 130 are denoted by 502a, 502b and 502c, while the control signals for the loudspeaker system at the right playback position are represented by 602a, 602b and 602c.
  • the push-pull signal generator 530 is represented in such a way that it carries out the spectral interleaving for the entire frequency range at the output of the low-pass filter 521.
  • the frequency filter 532 of FIGS. 8a and 8b is therefore not present in FIG.
  • the base push-pull signal generator 510 is designed to amplify a raw push-pull signal at the output of the respective adder 512, specifically by means of the controllable amplifier 1030 Attenuator 375 or 376, depending on the implementation, is attenuated, with the attenuators 375, 376 being adjustable differently in order to set the content of the raw push-pull signal in the actual base push-pull signal.
  • Attenuator 375 or 376 is attenuated, with the attenuators 375, 376 being adjustable differently in order to set the content of the raw push-pull signal in the actual base push-pull signal.
  • the basic push-pull signal does not “only” consist of the difference, but there is also the possibility of using a certain proportion of the common-mode signal due to the low-pass filter 521 of the common-mode signal generator and the attenuators 326a, 326c to the raw push-pull signal in order to then obtain the basic push-pull signal at the output of the attenuator 326c, which is then used, using the spectral interleaver 533a, 533b and the preceding or following phase shifters 531a, 531b (in Fig. 11 these are connected upstream only as an example) to obtain the corresponding push-pull signal, which is then passed through the mixer 541 and 542 to the corresponding
  • SUBSTITUTE SHEET (RULE 26) Corresponding common-mode signal at the output of the low-pass filter 521, which is labeled 529, is added accordingly in order to obtain the first drive signal 502a or the second drive signal 502b (after appropriate amplification by the amplifier 600).
  • the implementation for the right channel is analogous, with the controllable amplifier 1030 also being provided here, the output signal of which can be attenuated by the attenuator 376 and the output signal of which can then be mixed with a certain proportion of the common-mode signal which can be set by the corresponding attenuator.
  • the low-pass filter 656, as shown in FIG. 11, and the high-pass filter 621 for the tweeter signal generation are also provided in the second drive circuit for the right channel.
  • Figure 12 shows an alternative embodiment for implementing the drive circuit.
  • Figure 12 illustrates the configuration of the push-pull signal generator 530 of Figure 8a
  • Figure 13 illustrates the configuration of the push-pull signal generator of Figure 8b.
  • an attenuator is also provided at the input of the phase shifter device 531a or 531b in FIG. 12 or the frequency filter device 534a, 534b.
  • This attenuator 326c is designed to attenuate the input signal, depending on the implementation.
  • the common-mode signal is also mixed with the push-pull signal after appropriate damping by the damper 326a.
  • the high-pass element 557 and the low-pass element 535 are provided in order to process the raw signal that has already been amplified by the amplifier 1030, namely to filter it spectrally in order to obtain the low-pass signal from which the basic push-pull signal is calculated. and to obtain a high-pass signal which, after corresponding
  • the adjustable damping 558 can be added to the corresponding tweeter signal, i.e. the high-pass component of the left or right channel signal.
  • the high-pass filter 556, the attenuator 558, the high-pass filter 557, the adder 552 and the corresponding attenuator 551 are used for the actual tweeter signal generation. If the attenuation element 558 is set to high attenuation in FIG. 12 or FIG. 13, the implementation of FIG. 12 corresponds to the embodiment of FIG. 9 or FIG. 10. The same applies to setting the attenuator 326a to high attenuation.
  • the adder 539 becomes meaningless, so that the basic push-pull signal is based solely on the difference of the two channel signals.
  • mixing in part of the difference signal to the tweeter signal, to the effect that the damper 558 allows a damped version of the difference signal (in the high-frequency range) to pass, is advantageous in that there is a good balance between the amplitude of the tweeter signal and the amplitude of the midrange or woofer signal or the corresponding sound field generated in the air by the two sound transducers is achieved in order to add an additional amplitude in the midrange or bass range due to the addition of the correspondingly processed difference signal for the treble range as well take into account.
  • a level difference between the tweeter control signal and the overall level of the common mode and the differential mode can also be compensated for by appropriately amplifying the tweeter signal or by appropriately damping both the common mode signal and the differential mode signal for the corresponding sound transducer.
  • the amplitudes are balanced, although there is no push-pull mode in the high-frequency range, but there is a corresponding push-pull mode in the mid-range or low-frequency range.
  • the mid-range or woofer can be designed as a combined converter that covers both the mid-range and the low-range.
  • two different converters can be provided for the medium and low-frequency ranges, to the effect that the corresponding drive signal is correspondingly broadband and then runs through a crossover before it reaches the corresponding loudspeakers.
  • FIG. 1 shows a device for generating a control signal for a sound generator, which has a push-pull signal generator 1010, 80, a controllable amplifier 1030 and a controller 1020.
  • the push-pull signal generator 1010, 80 is designed to
  • the first channel signal 1001 or 71 or 306 and the second channel signal 1002 or 308 originate from a multi-channel audio signal and can be, for example, the left channel signal and the right channel signal.
  • the first channel signal can also be a left rear channel (left surround) or a right rear channel (right surround) or any other channel of a multi-channel audio signal, which can include not only a 5.1 format, but also higher formats, such as a 7.1 - format etc
  • the controllable amplifier 1030 is designed to amplify or attenuate the push-pull signal 1011 with an adjustable amplification or attenuation according to a setting value 1035 which the controllable amplifier 1030 receives from the controller 1020 .
  • the device in Fig. 1 is designed to use the amplified push-pull signal 1036 or 72 as the basis for the control signal for one or more sound generators, with different variants for generating the final control signal from the amplified push-pull signal with regard to Fig 5b, 7a, 7b, 8a, 8b, 11, 12, 13, 14, 15a, 15b or 16 are set forth below.
  • the controller 1020 is designed to determine the setting value 1035 such that a first setting value is determined when there is a first similarity between the first channel signal and the second channel signal, and that a second setting value is determined when there is a second similarity between the first channel signal and the second channel signal is determined, wherein in particular the first similarity represents a lower similarity than the second similarity, and wherein the first setting value represents a smaller amplification than the second setting value or a greater attenuation than the second setting value.
  • This relationship is shown schematically in the mapping function 1000, which represents a setting value for an amplification (setting value greater than 1) and/or for an attenuation (setting value less than 1), specifically as a function of a similarity scale.
  • the amplification increases for greater similarity values, ie for greater similarities between the first channel signal and the second channel signal.
  • the level loss of the push-pull signal which is preferably generated as a differential signal or an approximate differential signal, is compensated for or partially compensated for.
  • the amplification decreases the more dissimilar the two channel signals are, because then the level of the push-pull signal continues to increase.
  • a special situation arises in particular when the first channel signal and the second channel signal are particularly dissimilar, that is to say are completely correlated, but in phase opposition. Then the calculation of the push-pull signal leads to an overshoot
  • SUBSTITUTE SHEET (RULE 26) of the level of the push-pull signal, which according to the mapping function to map similarity values to setting values, as shown schematically at 1000 in FIG. 1, is approached according to the invention such that the push-pull signal is then less amplified or even attenuated , i.e. with a gain factor of less than 1 in a linear scale or with a negative gain factor in a logarithmic scale, such as a dB scale.
  • An amplification can be an amplification that leads to an increase in the level, i.e. an amplification with a gain factor greater than 1 or a positive gain factor on a dB scale.
  • amplification can also be amplification with an amplification factor of less than 1, ie attenuation. Then the amplification factor is between 0.1 or on a dB scale in the negative range.
  • the multi-channel audio signal comprising the first channel signal 1001, 71, 306 and the second channel signal 1002, 308 comprises metadata 1050, as illustrated in FIG.
  • the controller 1020 is designed to extract the setting value 1035, 1051 from the metadata 1050.
  • the controllable amplifier is designed to apply the adjustable amplification or attenuation to the push-pull signal 1011 in accordance with the extracted setting value. This is represented by the arrow into block 1020 for the metadata at 1051 . Then a direct signal analysis does not necessarily take place in the device of FIG.
  • a starting value for the setting value is read from the metadata 1051, which can then be refined by a device that is designed for an actual signal analysis.
  • a device that cannot perform signal analysis but can only read out the metadata 1051 will use the same start value for a whole piece, which is already an improvement, or at certain points in time within a piece, at which a new setting value in is present in the metadata, use this new setting value to set the controllable amplifier(s).
  • the controller 1020 is preferably designed to determine a correlation value between the first channel signal 1001, 71, 306 and the second channel signal 1002, 308, the correlation value being a measure of the similarity.
  • the controller 1020 is particularly preferably designed to calculate a normalized cross-correlation function from the first channel signal and the second channel signal, with a value of the normalized
  • SUBSTITUTE SHEET (RULE 26) cross-correlation function is a measure of similarity.
  • the controller 1020 is designed to calculate a correlation value using a correlation function that has a value range of negative and positive values, the controller being designed to determine a setting value for a negative value of the correlation function, which has an attenuation or amplification, and to determine the setting value for a positive value of the correlation function, which represents amplification or attenuation, ie the other in each case.
  • a typical normalized cross-correlation function has a range of values between -1 and +1, where the value -1 means that the two signals are fully correlated but in phase opposition, and are therefore at most dissimilar.
  • a value of +1 is obtained when the two channel signals are completely correlated and in phase, i.e. maximally similar.
  • the push-pull signal With a normalized cross-correlation function, the push-pull signal becomes ever larger with a decreasing value from -1 to 0, which is why the amplification factor in this range is reduced further and further.
  • the similarity decreases, which is why the push-pull signal is attenuated more and more or amplified less and less in order to counteract the excessive increase in the push-pull signal.
  • a similarity between the channel signals is therefore only concurrent with the cross-correlation function if the two channel signals are in phase, ie if the sign of the cross-correlation function is +1.
  • the similarity is opposite to the value of the cross-correlation function if the sign of the cross-correlation function is negative.
  • a preferred embodiment of the present invention resides within a mobile device, such as a mobile phone.
  • a mobile phone such as a mobile phone.
  • B. a mobile phone, a tablet, a notebook, etc.
  • the control device or the device for generating a control signal is loaded, for example, as a hardware element or as an app or as a program on the mobile phone.
  • the mobile phone is designed to receive the first audio signal and the second audio signal or multi-channel signal from any source, which can be local or on the Internet, and to generate the control signals depending on this.
  • These signals are transmitted from the mobile phone to the sound generator with the sound generator elements either by cable or wirelessly, for example using Bluetooth or WLAN.
  • the sound generator elements it is necessary for the sound generator elements to have a battery supply or, in general, a power supply in order to achieve appropriate amplification for the wireless signals received, for example in accordance with the Bluetooth format or in accordance with the WLAN format.
  • Device for generating control signals for a sound generator having the following features: a push-pull signal generator for generating a push-pull signal from a first channel signal and a second channel signal of a multi-channel audio signal, a common-mode signal generator for generating a first common-mode signal from the first channel signal or a second common-mode signal the second channel signal, wherein the device is designed to generate one or more control signals for one or more mid-tone or bass transducers of the sound generator using the first common-mode signal or the second common-mode signal and using the push-pull signal, and wherein the device is designed to generate a further control signal for a tweeter of the sound generator using the first common-mode signal or the second common-mode signal and using the push-pull signal, or wherein the device is designed to use band-selective processing when generating the control signals in a low-frequency range , in order to use the push-pull signal and the common-mode signal to control one or more mid-range or low-frequency converters of the
  • SUBSTITUTE SHEET (RULE 26) a controller (1020) for determining the setting value, the controller (1020) being designed to determine a first setting value when there is a first similarity between the first channel signal and the second channel signal and when there is a second similarity between the first channel signal and the second channel signal to determine a second setting value, wherein the first similarity represents a lower similarity than the second similarity, and wherein the first setting value represents a smaller amplification than the second setting value or a greater attenuation than the second setting value, or at which the controller (1020) is designed to determine a correlation value between the first channel signal and the second channel signal, the correlation value being a measure of the similarity.
  • controller (1020) is designed to calculate a normalized cross-correlation function from the first channel signal and the second channel signal, a value of the normalized cross-correlation function being a measure of the similarity.
  • the controller (1020) is designed to calculate a similarity value using a correlation function which has a value range of negative and positive values
  • the controller (1020) is designed to determine the setting value for a negative value of the correlation function, which represents either an attenuation or an amplification, and to determine the setting value for a positive value of the correlation function, which represents the other of the amplification or the attenuation represents.
  • SUBSTITUTE SHEET (RULE 26) represents lower similarity, a setting value is determined that provides a smaller gain than for a setting value that represents greater similarity.
  • controllable amplifier (1030) has an amplification range that runs between at least -6 dB and at least +6 dB
  • controller (1020) is designed, to map a range of values for a quantitative similarity value to the gain range (1000), or wherein the controller (1020) is further designed to assign a setting value for similarity values that indicate at least 90% similarity of the first channel signal and the second channel signal provide in which the common mode signal (1011) is amplified with a reduced gain compared to amplification at less than 90% identity between the first channel signal and the second channel signal.
  • controller (1020) is designed to analyze the push-pull signal (1011) and at a first amplitude-related variable of the push-pull signal (1011) the first setting value and at a second Amplitude-related size of the push-pull signal (1011) to determine the second setting value, the first amplitude-related size being greater than the second amplitude-related size.
  • the push-pull signal generator (1010, 80) is designed to determine the push-pull signal by forming a difference between the first channel signal and the second channel signal.
  • a multi-channel audio signal has the first channel signal and the second channel signal
  • the push-pull signal generator being designed to generate the push-pull signal (1011) and a further push-pull signal ( 1012) which is different from the push-pull signal (1011)
  • a further controllable amplifier (1032) being designed to amplify the further push-pull signal (1012)
  • the controller being designed to control the further controllable Amplifier (1032) to run a setting value which causes the same amplification or attenuation of the further push-pull signal (1012) compared to the amplification or attenuation of the push-pull signal (1011).
  • SUBSTITUTE SHEET (RULE 26) 11 Device according to one of the preceding examples, in which a cut-off frequency between the low-frequency range and the mid-sound range is between 0.3 and 1.2 kHz and preferably between 0.5 and 1 kHz, or in which a cut-off frequency between the mid-sound range and the high-frequency range is between 5 and 9 kHz and preferably between 6 and 8 kHz.
  • controller (1020) is designed to determine the setting value from the first channel signal and the second channel, and to use the first channel signal and the second channel signal with a high-pass filter or a band-pass filter to filter, and to determine the setting value from a filtered first channel signal and a second filtered channel signal, or in which the controller (1020) is designed to filter the push-pull signal (1011) with a high-pass filter or a band-pass filter, and to to determine the setting value from a filtered push-pull signal.
  • the multi-channel audio signal is an audio piece
  • the controller (1020) is designed to generate a setting value for the audio piece by analyzing the audio piece before generating the control signal, or in which the controller (1020) is designed to determine the setting value variably over time for the multi-channel audio signal, starting from a starting value, the controller (1020) being designed to determine the setting value based on a temporal determination to determine the range of the multi-channel audio signal that extends before a current time or after a current time, the range before the current time or the range after the current time encompassing a period of time between 1 ms and 15 s lies, or where the range covers a whole piece.
  • the multi-channel audio signal which includes the first channel signal and the second channel signal
  • the controller is further designed to convert the setting value ( 1051) from the metadata (1050) to be extracted
  • the controllable amplifier is designed to apply the adjustable amplification or attenuation to the push-pull signal (1011) according to the extracted setting value.
  • the two transducers z. B. are arranged to be deflected in a plane perpendicular to a base and wherein the tweeter z. B. is designed to be deflected perpendicular to a base, or wherein the two transducers z. B. are arranged to be deflected in a plane perpendicular to a surface normal of a front side of the sound generator and wherein the tweeter z. B. is designed to be deflected perpendicularly to the deflection of the two transducers.
  • Speaker configuration for an instrument panel or back shelf in a vehicle comprising: a sound generator according to example 16 at a left position, a sound generator according to example 16 at a middle position, and a sound generator according to example 16 at a right position , or a sound generator with a transducer at a left position, a sound generator according to Example 16 at a middle position, and a sound generator with a transducer at a right position, or
  • SUBSTITUTE SHEET (RULE 26) a sounder according to Example 16 at a left position, and a sounder according to Example 16 at a right position, or a sounder according to Example 16 at a left position, a sounder with a transducer at a middle position, and a sounder according to Example 16 at a right position.
  • Device for the sound supply optionally according to one of the preceding examples, with a left speaker group, a middle speaker group or a right speaker group in the direction of travel in front of a driver z. B. between a windshield and an instrument panel, wherein one or more of the speaker groups comprises a first and a second individual speaker and optionally a tweeter between the two individual speakers; and a device for generating a first control signal for a first individual loudspeaker from a first channel signal and a second control signal for a second individual loudspeaker in the same loudspeaker group from a second channel signal and a third control signal for the tweeter in the loudspeaker group from the first and the second Channel signal, wherein the device is designed to derive the third control signal from the first or second channel signal by high-pass filtering, or to use spectral interleaving for a differential signal for the first or second channel signal only in a lower frequency range and not in to use an upper frequency range, or to feed the same direct signal to the two individual loudspeakers
  • SUBSTITUTE SHEET (RULE 26) to generate the direct signal the first or the second Kanaisigna! to filter low-pass.
  • a push-pull signal (1011) from a first channel signal and a second channel signal of a multi-channel audio signal
  • the method being designed to generate one or more control signals for one or more mid-range or low-frequency converters of the sound generator using the first common-mode signal or the second common-mode signal and using of the push-pull signal, and wherein the method is designed to generate a further control signal for a tweeter of the sound generator using the first common-mode signal or the second common-mode signal and using the push-pull signal, or wherein the method is designed , in order to use band-selective processing (320a, b, c, 340a, b) when generating the drive signals in a low-frequency range, in order to use the push-pull signal and the common-mode signal for driving one or more mid-tone or to use the woofer of the sound generator (e.g. without the band selective processing) and to drive a single tweeter of the sound generator with a combination of the common mode signal and the push-pull signal.
  • band-selective processing 320a, b, c, 340a, b
  • SUBSTITUTE SHEET (RULE 26) is.
  • aspects described in connection with or as a method step also constitute a description of a corresponding block or detail or feature of a corresponding device.
  • Some or all of the method steps may be implemented by hardware apparatus (or under using a hardware apparatus) such as a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, some or more of the key process steps can be performed by such an apparatus.
  • embodiments of the invention can be implemented in hardware or in software. Implementation can be performed using a digital storage medium such as a floppy disk, DVD, Blu-ray Disc, CD, ROM, PROM, EPROM, EEPROM or FLASH memory, hard disk or other magnetic or optical memory, on which electronically readable control signals are stored, which can interact with a programmable computer system in such a way that the respective method is implemented. Therefore, the digital storage medium can be computer-readable.
  • Some exemplary embodiments according to the invention thus include a data carrier which has electronically readable control signals which are capable of interacting with a programmable computer system in such a way that one of the methods described herein is carried out.
  • exemplary embodiments of the present invention can be implemented as a computer program product with a program code, with the program code being effective to carry out one of the methods when the computer program product runs on a computer.
  • the program code can also be stored on a machine-readable carrier, for example.
  • Other exemplary embodiments include the computer program for performing one of the methods described herein, the computer program being stored on a machine-readable carrier.
  • an exemplary embodiment of the method according to the invention is therefore a computer program which has a program code for carrying out one of the methods described herein when the computer program runs on a computer.
  • a further exemplary embodiment of the method according to the invention is therefore a data carrier (or a digital storage medium or a computer-readable medium) on which the computer program for carrying out one of the methods described herein is recorded.
  • Another exemplary embodiment of the method according to the invention is
  • SUBSTITUTE SHEET (RULE 26) thus a data stream or sequence of signals representing the computer program for performing any of the methods described herein.
  • the data stream or the sequence of signals can, for example, be configured to be transferred via a data communication connection, for example via the Internet.
  • a processing device such as a computer or programmable logic device, configured or adapted to perform any of the methods described herein.
  • Another embodiment includes a computer on which the computer program for performing one of the methods described herein is installed.
  • a further exemplary embodiment according to the invention comprises a device or a system which is designed to transmit a computer program for carrying out at least one of the methods described herein to a recipient.
  • the transmission can take place electronically or optically, for example.
  • the recipient may be a computer, mobile device, storage device, or similar device.
  • the device or the system can, for example, comprise a file server for transmission of the computer program to the recipient.
  • a programmable logic device eg, a field programmable gate array, an FPGA
  • a field programmable gate array may cooperate with a microprocessor to perform any of the methods described herein.
  • the methods are performed on the part of any hardware device. This can be hardware that can be used universally, such as a computer processor (CPU), or hardware that is specific to the method, such as an ASIC, for example.

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  • General Health & Medical Sciences (AREA)
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Abstract

L'invention concerne un système de haut-parleurs comprenant les éléments suivants : un haut-parleur d'aigus (130, 230) ; deux haut-parleurs moyens ou de graves (110, 210, 120, 220) qui peuvent être commandés séparément et présentent une membrane sensiblement de même taille ; et un boîtier de système de haut-parleurs, le haut-parleur d'aigus et les deux haut-parleurs moyens ou de graves étant disposés dans le boîtier du système de haut-parleurs, et le haut-parleur d'aigus étant disposé entre les deux haut-parleurs moyens ou de graves.
EP22777268.8A 2021-09-30 2022-09-29 Système de haut-parleurs, circuit de commande pour un système de haut-parleurs comprenant un haut-parleur d'aigus et deux haut-parleurs moyens ou de graves et procédés correspondants Pending EP4409927A2 (fr)

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EP22777268.8A Pending EP4409927A2 (fr) 2021-09-30 2022-09-29 Système de haut-parleurs, circuit de commande pour un système de haut-parleurs comprenant un haut-parleur d'aigus et deux haut-parleurs moyens ou de graves et procédés correspondants

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024159033A (ja) * 2023-04-28 2024-11-08 トヨタ自動車株式会社 音制御装置、音制御用コンピュータプログラム及び音制御方法

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4748669A (en) * 1986-03-27 1988-05-31 Hughes Aircraft Company Stereo enhancement system
US6801631B1 (en) * 1999-10-22 2004-10-05 Donald J. North Speaker system with multiple transducers positioned in a plane for optimum acoustic radiation pattern
US20050135639A1 (en) * 2000-01-27 2005-06-23 Advanced Information Processing Lab, Llc Method and apparatus to digitally simulate periodic frequency modulation
US7433483B2 (en) * 2001-02-09 2008-10-07 Thx Ltd. Narrow profile speaker configurations and systems
EP1280377A1 (fr) * 2001-07-27 2003-01-29 A&D Engineering Co., Ltd. Configuration de haut-parleurs et processeur de signal pour la reproduction sonore stéréo pour un véhicule et véhicule avec la configuration
US7522742B2 (en) * 2005-03-21 2009-04-21 Speakercraft, Inc. Speaker assembly with moveable baffle
DE602007007909D1 (de) * 2006-03-15 2010-09-02 Dolby Lab Licensing Corp Abbildung stereophoner klänge
US7654361B2 (en) * 2006-08-08 2010-02-02 Induction Dynamics Llc Balanced cantilever spring bracket
US8184847B2 (en) * 2007-05-11 2012-05-22 Honda Motor Co., Ltd Vehicle speaker mounting system
GB0723920D0 (en) * 2007-12-06 2008-01-16 Airsound Llp An improved apparatus and method for reproduction of stereo sound
JPWO2009078164A1 (ja) * 2007-12-18 2011-04-28 パナソニック株式会社 指向性調整パネルを備えたスピーカ装置
DE102009010278B4 (de) * 2009-02-16 2018-12-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Lautsprecher
AT507622B1 (de) * 2009-03-19 2010-09-15 Weingartner Bernhard Dipl Ing Ohraufliegender kopfhörer
US20100246880A1 (en) * 2009-03-30 2010-09-30 Oxford J Craig Method and apparatus for enhanced stimulation of the limbic auditory response
EP2692144B1 (fr) 2011-03-30 2017-02-01 Kaetel Systems GmbH Haut-parleur
US8811630B2 (en) * 2011-12-21 2014-08-19 Sonos, Inc. Systems, methods, and apparatus to filter audio
US9131307B2 (en) * 2012-12-11 2015-09-08 JVC Kenwood Corporation Noise eliminating device, noise eliminating method, and noise eliminating program
CN104641659B (zh) * 2013-08-19 2017-12-05 雅马哈株式会社 扬声器设备和音频信号处理方法
DE102013221754A1 (de) 2013-10-25 2015-04-30 Kaetel Systems Gmbh Kopfhörer und verfahren zum herstellen eines kopfhörers
DE102013221752A1 (de) 2013-10-25 2015-04-30 Kaetel Systems Gmbh Ohrhörer und verfahren zum herstellen eines ohrhörers
EP3041265B1 (fr) * 2014-09-08 2019-12-18 Adamson Systems Engineering Inc. Haut-parleur à comportement directionnel amélioré et réduction des interférences acoustiques
US9860666B2 (en) * 2015-06-18 2018-01-02 Nokia Technologies Oy Binaural audio reproduction
US11032660B2 (en) * 2016-06-07 2021-06-08 Philip Schaefer System and method for realistic rotation of stereo or binaural audio
US10251012B2 (en) * 2016-06-07 2019-04-02 Philip Raymond Schaefer System and method for realistic rotation of stereo or binaural audio
TWI660637B (zh) * 2017-10-13 2019-05-21 華一聲學股份有限公司 點聲源揚聲器
CN113316941B (zh) * 2019-01-11 2022-07-26 博姆云360公司 声场保存音频通道求和

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TWI859591B (zh) 2024-10-21
US20240236552A1 (en) 2024-07-11
TW202325041A (zh) 2023-06-16
WO2023052557A1 (fr) 2023-04-06
EP4409931A1 (fr) 2024-08-07
WO2023052555A3 (fr) 2023-05-25
TWI859590B (zh) 2024-10-21
US20240236612A1 (en) 2024-07-11
WO2023052555A2 (fr) 2023-04-06

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