EP3850617A1 - Method and device for generating acoustic compensation signals - Google Patents
Method and device for generating acoustic compensation signalsInfo
- Publication number
- EP3850617A1 EP3850617A1 EP18769356.9A EP18769356A EP3850617A1 EP 3850617 A1 EP3850617 A1 EP 3850617A1 EP 18769356 A EP18769356 A EP 18769356A EP 3850617 A1 EP3850617 A1 EP 3850617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- audio
- eoc
- assessment
- signals
- audio 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000005236 sound signal Effects 0.000 claims abstract description 126
- 230000001419 dependent effect Effects 0.000 claims description 22
- 238000011156 evaluation Methods 0.000 abstract description 6
- 230000001052 transient effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17827—Desired external signals, e.g. pass-through audio such as music or speech
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/121—Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3032—Harmonics or sub-harmonics
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3054—Stepsize variation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/50—Miscellaneous
- G10K2210/503—Diagnostics; Stability; Alarms; Failsafe
Definitions
- the invention relates to a method for operating a device for generating acoustic compensation signals which are used to compensate for acoustic signals which result from the operation of a drive motor on the motor vehicle.
- EOC devices must therefore be controlled for a specific acoustic situation within a vehicle interior such that the EOC device can be operated as stably as possible. Furthermore, if possible, only the acoustic signals to be actually compensated, i. H. the acoustic signals resulting from the operation of a drive motor on the motor vehicle are compensated and the other audio signals are not compensated for if possible.
- the invention is based on the object of specifying an improved method for operating a device for generating acoustic compensation signals, which are used to compensate for acoustic signals which result from the operation of a motor vehicle drive motor.
- the object is achieved by a method according to claim 1.
- the dependent claims relate to possible embodiments of the method according to claim 1.
- the method described here is generally used to operate a device for generating acoustic compensation signals, which are used to compensate for acoustic signals. These include, in particular, acoustic interference signals, such as, for. B. to understand speed and / or load-dependent vibrations of certain harmonic order - which result from the operation of a motor vehicle-side drive motor, ie typically an internal combustion engine, serve.
- the method includes, in particular, the control of the operation of an engine order cancellation device, or EOC device for short, so that the method may also be referred to or viewed as a method for controlling the operation of an EOC device on the vehicle can.
- a hardware and / or software implemented EOC device to be operated (according to the method).
- the EOC device is in a manner known per se for generating acoustic compensation signals which are used to compensate for acoustic signals which result from the operation of a motor vehicle drive motor, ie. H. typically an internal combustion engine, result in a vehicle interior typically defined by a passenger compartment.
- the EOC device comprises at least one audio recording element, i. H. e.g. B. a microphone, and at least one audio output element, d. H. e.g. B. a speaker.
- the provision of the EOC device in the first step typically does not mean that the EOC device is already put into operation in the first step; In the first step, the EOC device typically does not yet generate any corresponding compensation signals.
- a device is thus provided which is configured in line with the EOC device, ie typically has the same functionality as the EOC device.
- the facility can be a (virtual) image of the EOC facility.
- the device can therefore be configured with the same operating or tuning parameters as the EOC device.
- the device can in particular have the same tuning parameters as the EOC device.
- the facility hence z. B. the same drive motor speed or drive motor load-dependent motor vibrations or orders, the same forgetting factor l (eng forgetting factor) or the same step size m (eng adaptation step size).
- the device can also have the same bandwidth and the same transient behavior as the EOC device.
- the facility may or may not be referred to or considered a (virtual) second EOC facility.
- a device which connects acoustically directly with an audio recording element, i.e. H. e.g. B. a (virtual) microphone, coupled audio output element, d. H. e.g. B. includes a (virtual) speaker.
- a direct acoustic coupling is to be understood in particular to mean that the output of the audio output element of the device is directly coupled or connected to the input of the audio recording element of the device.
- At least one audio signal to be output via a one or more audio output elements is determined in a passenger compartment of a motor vehicle. It is essential that the at least one audio signal is ascertained before it is recorded by an audio recording element belonging to the EOC device, ie a microphone, or by an audio recording element belonging to the EOC device, eg a microphone .
- the at least one audio signal is typically determined before it reaches an audio recording element belonging to the EOC device.
- the at least one audio signal can be determined before the at least one audio signal is actually output into the passenger compartment via the audio output device.
- the third step information is collected about all those audio signals which would have to be output in the passenger compartment of the motor vehicle or which would be output at a later time in the passenger compartment of the motor vehicle.
- the acoustic situation defined by corresponding audio signals within the passenger compartment can be carried out prematurely, ie before it is detected by an audio recording element belonging to the EOC device, in particular before it is actually given by the output of the audio signals in the passenger compartment (simulative or virtual ) be determined.
- the EOC facility in the acoustic situation on the part of the EOC device generates compensation signals for compensating corresponding acoustic signals to be compensated.
- the determination can be carried out by means of a hardware and / or software implemented detection device, which is set up to determine at least one audio signal to be output via a audio output device comprising one or more audio output elements in a passenger compartment of a motor vehicle.
- corresponding audio signals to be output in the passenger compartment may e.g. B. acoustic multimedia or infotainment signals, d. H. e.g. B. act music, speech or other sound-tone sequence signals.
- Corresponding multimedia or infotainment signals can, for. B. generated by a vehicle-side multimedia or infotainment device.
- corresponding audio signals to be output in the passenger compartment it can alternatively or additionally also be artificially generated acoustic engine noise signals, ie. H. Audio signals that represent a certain engine type and / or a certain operating state of a certain engine type act.
- Corresponding acoustic engine noise signals can, for. B.
- an audio output device can be used within the scope of the method, which is a multimedia or infotainment device for outputting audio content, in particular music, speech, or a motor audio signal generating device for outputting audio content modeled on a specific engine noise.
- a corresponding audio signal to be output into the passenger compartment can also be a compensation signal generated by the EOC device.
- the audio signal (s) determined in the third step is / are typically known. There is therefore information, in particular on the part of the device, which describes the audio signals which are to be output in the passenger compartment.
- at least one known audio signal which in particular uses at least one motor vehicle audio signal generating device, in particular a multimedia device for generating multimedia content, or an engine noise generating device for generating a specific engine type and / or a specific operating state of a specific engine type, can be generated or generated audio signal determined.
- an assessment rule is used to assess the at least one audio signal to be output into the passenger compartment with regard to at least one assessment criterion.
- the audio signals to be output into the passenger compartment are then assessed or examined with regard to one or more assessment criteria defined by the assessment rule.
- the assessment includes, in particular, an examination of the audio signals to determine whether they meet an assessment criterion or not.
- the assessment rule can be stored in an assessment device implemented in hardware and / or software. The assessment can thus be carried out by means of an assessment device implemented in hardware and / or software, which is set up to apply an assessment rule for assessing the at least one audio signal to be output into the passenger compartment with regard to at least one assessment criterion.
- an audio sum signal formed by summation of the respective audio signals, optionally weighted with at least one weighting parameter, can be formed and used, to which the assessment rule is applied.
- the summation of respective audio signals can be advantageous in that only one signal, namely the audio sum signal, has to be viewed and processed.
- the summation of respective audio signals can take place via a hardware and / or software implemented summation device, which is set up for summing the respective audio signals to form a corresponding audio sum signal.
- assessment information describing the assessment of the at least one audio signal with regard to the assessment criterion is generated.
- the result of the assessment of the at least one audio signal, which is carried out in the fourth step, is then mapped in the fifth step in a corresponding assessment information item.
- the assessment information can be generated by the or a corresponding hardware and / or software implemented assessment device which is set up to generate assessment information describing the assessment of the at least one audio signal with regard to the assessment criterion.
- a sixth step of the method the operation of the EOC device for generating acoustic compensation signals is controlled, which is the compensation of acoustic signals which result from the operation of a Motor vehicle-side drive motor result, serve, based on the evaluation information.
- the assessment information generated in the fifth step can therefore form the basis for the generation of control information on which the actual operation of the EOC device is based.
- the operation of the EOC device can be controlled via a central or decentralized hardware and / or software-implemented control device which is set up to control the operation of the EOC device on the basis of the assessment information.
- the control of the operation of the EOC device can e.g. B. on the basis of the assessment information by adapting at least one operating or tuning parameter, in particular an l or m parameter, d. H. the forgetting factor l or the step size m of the EOC device.
- the control of the operation of the EOC device can be adjusted by adapting at least one operating or tuning parameter, in particular an l or m parameter, of the EOC device for at least one, in particular by at least one tuning parameter of the EOC device, engine speed or harmonic motor vibration or order depending on the drive motor load. It is therefore possible to individually adapt operating parameters for respective harmonic motor vibrations or orders that are dependent on the drive motor speed or drive motor load.
- the operating parameters of the EOC device are expediently adjusted before the generation and output of the respective compensation signals.
- the method thus enables the operation of an EOC device to be controlled on the basis of an early or premature determination and assessment of typically known audio signals which are to be output in a passenger cell, into which passenger cell the compensation signals generated by the EOC device are also output should. It is essential that the determination and assessment of the audio signals takes place before these audio signals are recorded by an audio recording element belonging to the EOC device, eg a microphone, or by an audio recording element belonging to the EOC device, ie eg a microphone, be included.
- the audio signals are ascertained and assessed before these audio signals can take place, in particular, before they are actually output into the passenger compartment.
- the audio signals are typically also determined and assessed before the corresponding compensation signals are output in the passenger compartment.
- the determination of the at least one audio signal to be output via the audio output device into the passenger compartment of the motor vehicle before it is triggered by an audio recording element belonging to the EOC device, ie. H. e.g. B. a microphone is detected, in particular before it is output via the audio output device into the passenger compartment, can be configured by the device modeled on the EOC device.
- the device can thus be designed as a corresponding determination device or comprise such a device. This can simplify the configuration of a device set up to carry out the method when the device has a large number of functionalities which are necessary or expedient for carrying out the method.
- the determination of the at least one audio signal to be output via the audio output device in a passenger compartment can, for. B. include a determination of the acoustic properties of the audio signal. Therefore, in particular transient, acoustic properties, such as. B. amplitudes or amplitude profiles, frequencies or frequency profiles, energies or energy profiles, etc., of the audio signal. The same applies to a corresponding audio sum signal.
- the assessment rule can include an assessment of the at least one audio signal as to whether the audio signal has audio signal components with harmonic engine vibrations or orders, which are predetermined by engine motor speed or engine load and are predetermined by at least one tuning parameter of the EOC device.
- the at least one audio signal can then be assessed or examined to determine whether this audio signal component has harmonic engine vibrations or orders that are dependent on the drive motor speed or drive motor load and are predetermined, in particular by at least one tuning parameter of the EOC device.
- the assessment rule can evaluate the at least one audio signal as to whether the audio signal corresponds to frequency components or waveforms which correspond to drive motor speed or drive motor load-dependent frequency components of harmonic motor vibrations or orders, in particular by at least one tuning parameter of the EOC device correlate, include.
- the at least one audio signal can then be assessed or examined to determine whether it contains frequency components or profiles which, in particular by means of at least one tuning parameter of the EOC device, correspond to harmonic engine vibrations or orders that are dependent on the engine speed or engine load or correlate with these.
- the assessment criterion can therefore z. B. be at least one frequency component or a (time-dependent) frequency profile or include one (s) which (r) with respect to at least one, in particular by at least one tuning parameter of the EOC device, dependent on the engine speed or engine load harmonic engine vibration or order is assessed or examined.
- the assessment criterion can be or comprise a, in particular time-dependent, frequency component which, with regard to at least one frequency component, in particular predetermined by at least one tuning parameter of the EOC device, assesses or at least one harmonic motor oscillations or order dependent on the drive motor speed or drive motor load is examined.
- the assessment rule can also be an assessment of the amplitude, i. H. in particular an upper and / or lower limit amplitude, or a corresponding frequency component, which frequency component, in particular by at least one tuning parameter of the EOC device, corresponds to frequency components of harmonic motor vibrations or orders that are dependent on the drive motor speed or drive motor load.
- a frequency component which corresponds to a frequency component of a harmonic motor oscillation or order can thus be assessed with regard to its amplitude.
- the invention further relates to a device for generating acoustic compensation signals which are used to compensate for acoustic signals which result from the operation of a drive motor on the motor vehicle.
- the device comprises a hardware and / or software implemented EOC device which is set up to generate acoustic compensation signals which compensate for acoustic signals which result from the operation of a drive motor on the motor vehicle side; a hardware and / or software implemented device modeled after the EOC device; a hardware and / or software implemented audio output device which is set up for outputting audio signals into a passenger compartment of a motor vehicle; a hardware and / or software implemented determination device which for determining at least one audio signal to be output via the audio output device into a passenger compartment before it is detected by an audio recording element belonging to the EOC device, eg a microphone, in particular before this via the audio output device is issued into the passenger compartment is set up; a hardware and / or software-implemented assessment device which is set up to use an assessment rule for assessing the audio
- the device is expediently arranged or configured between the audio output device and the EOC device, in particular between an output of the audio output device and an input of the EOC device.
- the device expediently comprises at least one audio recording element and at least one audio output element, the at least one audio output element being acoustically coupled directly to the at least one audio recording element.
- the invention further relates to a motor vehicle, ie in particular a passenger car, which comprises at least one device as described herein. All Statements in connection with the device and the method also apply analogously to the motor vehicle.
- Fig. 1 is a schematic diagram of a flow chart to illustrate a
- Fig. 2 is a schematic diagram of an embodiment of a device for
- acoustic compensation signals which are used to compensate for acoustic signals 3.
- acoustic interference signals such as, for. B. to understand speed or load-dependent vibrations of certain harmonic order - which from the operation of a motor vehicle-side drive motor 4, d. H. typically an internal combustion engine, result, serve.
- FIG. 2 shows a basic illustration of an exemplary embodiment of a device 1 for carrying out the method illustrated in FIG. 1.
- the device 1 is in a purely schematically illustrated motor vehicle 2, i. H. typically a passenger car.
- a hardware and / or software implemented EOC device 5 is provided.
- the EOC device 5 is in a manner known per se for generating acoustic compensation signals which are used to compensate for corresponding acoustic signals 3 the operation of the drive motor 4 results in a vehicle interior 9 typically defined by the passenger compartment 8 of the motor vehicle 2.
- the EOC device 5 comprises, in a manner known per se, at least one audio recording element 5a, ie, for example a microphone, and at least one audio output element 5b, ie, for example a loudspeaker.
- the provision of the EOC device 5 in the first step does not mean that the EOC device 5 is already put into operation in the first step; by doing first step, no corresponding compensation signals are generated by the EOC device 5.
- a hardware and / or software implemented device 6 that is modeled on the EOC device 5 (identically), and in the second step S2 of the method a device is then provided which the EOC device 5 is configured in a model, d. H. typically has the same functionality and configuration as the EOC device 5.
- the device 6 is accordingly a (virtual) image of the EOC device 5.
- the device 6 is therefore typically configured with the same operating or tuning parameters as the EOC device 5.
- the device 6 can in particular have the same tuning parameters TP as the EOC device 5. Specifically, 6 so z. B. the same engine speed or engine load-dependent engine vibrations or orders, the same
- the device 6 can in particular also have the same bandwidth and the same transient behavior as the EOC device 5.
- the device 6 can therefore be referred to or regarded as a (virtual) second EOC device.
- a device 6 can be used which connects acoustically directly with an audio recording element 6a, i.e. H. e.g. B. a (virtual) microphone, coupled audio output element 6b, d. H. e.g. B. includes a (virtual) speaker.
- an audio recording element 6a i.e. H. e.g. B. a (virtual) microphone
- coupled audio output element 6b d. H. e.g. B. includes a (virtual) speaker.
- the method can be carried out with a considerable time advantage.
- psychoacoustic masking effects can be applied or taken into account.
- an audio signal 10 to be output via one or more audio output elements 7a-7c, ie typically loudspeakers, into the passenger compartment 8 of the motor vehicle 2 is determined.
- several audio signals 10 can also be determined. It is essential that the audio signal (s) 10 are determined before they are detected by an audio recording element belonging to the EOC device, ie, for example a microphone, in particular before they are actually transmitted into the passenger compartment via the audio output device 7 8 is output.
- information is collected about all those audio signals 10 which would have to be output in the passenger compartment 8 of the motor vehicle 2 or at a later time in the Passenger cell 8 of the motor vehicle 2 are output.
- the acoustic situation defined by corresponding audio signals 10 within the passenger compartment 8 can be carried out prematurely, ie before the audio signals 10 are detected by an audio recording element 5a belonging to the EOC device 5, in particular before the audio signals 10 are actually output in the passenger compartment 8 ( simulative or virtual) can be determined.
- compensation signals for compensating corresponding acoustic signals 3 to be compensated are generated by the EOC device 5 in the acoustic situation.
- the determination can be carried out by means of a hardware and / or software implemented determination device 11, which is set up to determine at least one audio signal 10 to be output via the audio output device 7 into the passenger compartment 8 of the motor vehicle 2.
- the determination device 11 can form part of the device 6.
- audio signals 10 to be output in the passenger compartment 8 it can be e.g. B. acoustic multimedia or infotainment signals, d. H. e.g. B. act music, speech or other sound-tone sequence signals.
- Corresponding multimedia or infotainment signals can, for. B. generated by a vehicle-side multimedia or infotainment device 12.
- Corresponding audio signals 10 to be output in the passenger compartment 8 may alternatively or additionally also be artificially generated acoustic engine noise signals, i. H. are audio signals which represent a certain engine type and / or a certain operating state of a certain engine type.
- Corresponding acoustic engine noise signals can, for. B. on the part of a motor vehicle engine noise generating device 13, for. B. in the form of an engine sound synthesis device, short ESS device.
- a corresponding audio signal 10 to be output in the passenger compartment 8 can also be a compensation signal generated by the EOC device 5.
- the audio signal (s) 10 determined in the third step S3 is / are known. There is therefore information on the part of the device 1, ie in particular on the part of the device 6, which describes the audio signals 10 which are to be output into the passenger compartment 8.
- the third step S3 typically at least one known, in particular via a motor vehicle-side audio signal generating device 14, ie, for example, in particular a multimedia or infotainment device 12 and / or the Engine noise generating device 13, generated or generated audio signal 10 determined.
- an assessment rule is used to assess the audio signal (s) 10 to be output into the passenger compartment 8 with regard to at least one assessment criterion.
- the audio signals 10 to be output into the passenger compartment 8 are then assessed or examined with regard to one or more assessment criteria defined by the assessment rule.
- the assessment includes, in particular, an examination of the audio signals 10 as to whether or not they fulfill an assessment criterion.
- the assessment rule is stored in an assessment device 15 implemented in hardware and / or software.
- the assessment can then be carried out by means of an assessment device 15 implemented in terms of hardware and / or software, which is set up to apply an assessment rule for assessing the audio signals 10 to be output into the passenger compartment 8 with regard to at least one assessment criterion. It can be seen from the exemplary embodiment shown in FIG. 2 that the assessment device 15 can form part of the device 6.
- the assessment rule can include an assessment of the audio signals 10 or a corresponding audio sum signal as to whether these (s) audio signal components have harmonic engine vibrations or orders, which are predetermined by drive engine speed or drive engine load and are predetermined by at least one tuning parameter TP of the EOC device 5 .
- the audio signals 10 or a corresponding audio sum signal can thus be assessed or examined to determine whether they have harmonic engine vibrations or orders, which are predetermined by the engine speed or drive motor load and are predetermined by at least one tuning parameter TP of the EOC device 5.
- the assessment rule can assess the audio signals 10 or a corresponding audio sum signal as to whether these (s) frequency components, which, in particular by at least one tuning parameter TP of the EOC device 5, drive motor speed or drive motor load-dependent frequency components of harmonic motor vibrations or orders correspond or correlate with them.
- the audio signals 10 or a corresponding audio sum signal can then be assessed or examined to determine whether they contain frequency components which, in particular, by at least one Tuning parameters TP of the EOC device 5 correspond to predetermined, frequency components of drive motor speed or drive motor load-dependent harmonic motor vibrations or orders or correlate with these.
- the assessment criterion can therefore z. B. be at least one frequency component or include such, which is assessed or examined with respect to at least one, in particular by at least one tuning parameter TP of the EOC device 5, drive motor speed or drive motor load-dependent harmonic motor vibration or order.
- the assessment criterion can accordingly be or include a frequency component which, in view of at least one frequency component, which is predetermined by at least one tuning parameter TP of the EOC device 5, judges or regulates harmonic engine vibrations or orders dependent on the engine speed or engine load. is examined.
- an audio sum signal formed by summing the respective audio signals 10, optionally weighted with at least one weighting parameter, to which the assessment rule is applied can be formed and used.
- the summation of respective audio signals 10 can take place via a hardware and / or software implemented summation device (not shown) which is set up for summing the respective audio signals 10 to form a corresponding audio sum signal.
- the summing device can also form part of the device 6.
- a fifth step S5 of the method assessment information describing the assessment of the audio signal (s) 10 with regard to the assessment criterion is generated.
- the result of the assessment of the audio signal (s) 10, which was carried out in the fourth step S4, is subsequently mapped in a corresponding assessment information in the fifth step S5.
- the assessment information can be generated by the assessment device 15, which is set up to generate assessment information describing the assessment of the at least one audio signal with regard to the assessment criterion.
- a sixth step S6 of the method the operation of the EOC device 5 is controlled to generate acoustic compensation signals which compensate for the acoustic effects resulting from the operation of the drive motor 4 Signals 3 serve based on the judgment information.
- the assessment information generated in the fifth step S5 thus forms the basis for the generation of control information on which the actual operation of the EOC device 5 is based.
- the operation of the EOC device 5 can be controlled via a central or decentralized hardware and / or software-implemented control device which is set up to control the operation of the EOC device 5 on the basis of the assessment information. In the exemplary embodiment shown in FIG. 2, the operation of the EOC device 5 is controlled, for example, via a control device 16 assigned to the EOC device 5.
- the control of the operation of the EOC device 5 can be based on the assessment information by adapting at least one operating or tuning parameter, in particular an l or m parameter, i. H. the forgetting factor l or the step size m of the EOC device 5.
- the control of the operation of the EOC device 5 can be adjusted by adapting at least one operating parameter, in particular an l or m parameter, of the EOC device 5 for at least one drive motor speed, in particular given by at least one tuning parameter TP of the EOC device 5.
- harmonic motor vibration or order depending on the drive motor load It is therefore possible to individually adjust operating or tuning parameters for respective harmonic motor vibrations or orders that are dependent on the drive motor speed or drive motor load. In all cases, the operating parameters of the EOC device 5 are adjusted before the generation and output of respective compensation signals.
- the method enables the operation of the EOC device 5 to be controlled on the basis of an early or premature determination and assessment of known audio signals 10 which are to be output in the passenger compartment 8 and in which the compensation signals generated by the EOC device 5 are also output should be. It is essential that the determination and assessment of the audio signals 10 takes place before they are recorded by an audio recording element 5a, that is to say a microphone, for example, before the audio signals 10 are actually output into the passenger compartment 8. The determination and assessment of the audio signals 10 is also carried out before the corresponding compensation signals are output into the passenger compartment 8. Such is the risk of an interaction between the compensation signals and the others in FIG. 5 which has a negative effect on the stability of the operation of the EOC device 5 and thus on the compensation result the audio signals 10 to be output or output reduced.
- the determination of the audio signals 10 to be output via the audio output device 7 into a passenger compartment 8 can, for. B. include a determination of the acoustic properties of the audio signals 10. Therefore, in particular transient, acoustic properties, such as. B. amplitudes or amplitude profiles, frequencies or frequency profiles, energies or energy profiles, etc., the audio signals 10 are determined. The same applies to a corresponding audio sum signal.
- the device 1 shown in FIG. 2 comprises the following:
- a hardware and / or software implemented EOC device 5 which is set up to generate acoustic compensation signals, which compensate for acoustic signals 3, which result from the operation of a motor vehicle drive motor 4;
- a hardware and / or software implemented determination device 11 which for determining at least one audio signal 10 to be output via the audio output device 7 into a passenger compartment 8 of a motor vehicle 2, before this is transmitted by an audio recording element 5a, d. H. e.g. B. a microphone is detected, in particular before it is output via the audio output device 7 into the passenger compartment 8;
- a hardware and / or software implemented assessment device 15 which is used to apply an assessment rule for assessing the at least one Audio signal 10 with regard to at least one assessment criterion and for generating assessment information describing the assessment of the at least one audio signal 10 with regard to the assessment criterion; such as
- a hardware and / or software implemented control device 16 which is set up to control the operation of the EOC device 5 on the basis of the assessment information.
- the device 6 can be arranged or formed between the audio output device 7 and the EOC device 5, in particular between an output of the audio output device 7 and an input of the EOC device 5.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/EP2018/074673 WO2020052757A1 (en) | 2018-09-12 | 2018-09-12 | Method and device for generating acoustic compensation signals |
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EP3850617A1 true EP3850617A1 (en) | 2021-07-21 |
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EP18769356.9A Pending EP3850617A1 (en) | 2018-09-12 | 2018-09-12 | Method and device for generating acoustic compensation signals |
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US (1) | US11341950B2 (en) |
EP (1) | EP3850617A1 (en) |
CN (1) | CN112714932A (en) |
WO (1) | WO2020052757A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19531402C2 (en) * | 1995-08-26 | 1999-04-01 | Mannesmann Sachs Ag | Device and method for influencing vibrations in a passenger compartment of a motor vehicle and device and method for detecting defects in a motor vehicle |
DE10105184A1 (en) * | 2001-02-06 | 2002-08-29 | Bosch Gmbh Robert | Method for automatically adjusting a digital equalizer and playback device for audio signals to implement such a method |
ATE402468T1 (en) * | 2004-03-17 | 2008-08-15 | Harman Becker Automotive Sys | SOUND TUNING DEVICE, USE THEREOF AND SOUND TUNING METHOD |
US8355512B2 (en) | 2008-10-20 | 2013-01-15 | Bose Corporation | Active noise reduction adaptive filter leakage adjusting |
US8135140B2 (en) * | 2008-11-20 | 2012-03-13 | Harman International Industries, Incorporated | System for active noise control with audio signal compensation |
US9179237B2 (en) * | 2011-12-16 | 2015-11-03 | Bose Corporation | Virtual audio system tuning |
EP3157001B1 (en) * | 2015-10-16 | 2023-05-10 | Harman Becker Automotive Systems GmbH | Engine order and road noise control |
DE102016120038A1 (en) * | 2016-10-20 | 2018-04-26 | Ask Industries Gmbh | Method and device for suppressing acoustic interference signals resulting from the operation of a motor vehicle-side drive unit |
-
2018
- 2018-09-12 US US17/273,421 patent/US11341950B2/en active Active
- 2018-09-12 WO PCT/EP2018/074673 patent/WO2020052757A1/en unknown
- 2018-09-12 EP EP18769356.9A patent/EP3850617A1/en active Pending
- 2018-09-12 CN CN201880097450.3A patent/CN112714932A/en active Pending
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US20210201882A1 (en) | 2021-07-01 |
US11341950B2 (en) | 2022-05-24 |
CN112714932A (en) | 2021-04-27 |
WO2020052757A1 (en) | 2020-03-19 |
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