WO2023134840A1 - Appareil de reproduction conjointe de son et de vibration - Google Patents

Appareil de reproduction conjointe de son et de vibration Download PDF

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Publication number
WO2023134840A1
WO2023134840A1 PCT/EP2022/050431 EP2022050431W WO2023134840A1 WO 2023134840 A1 WO2023134840 A1 WO 2023134840A1 EP 2022050431 W EP2022050431 W EP 2022050431W WO 2023134840 A1 WO2023134840 A1 WO 2023134840A1
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WO
WIPO (PCT)
Prior art keywords
board
sound
padding
vibration
reproduction apparatus
Prior art date
Application number
PCT/EP2022/050431
Other languages
English (en)
Inventor
Tommi Immonen
Jukka Linjama
Original Assignee
Flexound Systems Oy
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 Flexound Systems Oy filed Critical Flexound Systems Oy
Priority to PCT/EP2022/050431 priority Critical patent/WO2023134840A1/fr
Publication of WO2023134840A1 publication Critical patent/WO2023134840A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/10—Pillows
    • A47G9/1045—Pillows shaped as, combined with, or convertible into other articles, e.g. dolls, sound equipments, bags or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/879—Head-rests with additional features not related to head-rest positioning, e.g. heating or cooling devices or loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G2009/006—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows comprising sound equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2002/981—Warning systems, e.g. the seat or seat parts vibrates to warn the passenger when facing a danger
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H04R1/288—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H04R2201/023—Transducers incorporated in garment, rucksacks or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H04R5/023—Spatial or constructional arrangements of loudspeakers in a chair, pillow

Definitions

  • the example embodiments of the present invention relate to reproduction of sound and vibration.
  • Human auditory perception takes place primarily through the ears while it is supported by the sense of touch especially at lower end of frequency spectrum.
  • sound pressure levels above 80 dB are typically required in order to produce an audible sound that is perceivable by a human listener.
  • human skin starts to vibrate to a perceivable extent as well, resulting in sound perception via a tactile sense (i.e. tactile perception) that serves to support hearing.
  • tactile sense i.e. tactile perception
  • human perception of sounds is solely based on tactile perception, whereas the tactile perception typically extends to frequencies around 500 Hz.
  • sensitized people who may have sensory impairments affecting their other senses may perceive sound via the tactile sense up to frequencies around 1000 Hz.
  • the tactile sense supports human hearing over a considerable part of the perceivable audio frequency spectrum.
  • WO 2015/118217 A1 discloses an apparatus 30 for comprehensive perception of sound, which is schematically illustrated in Figure 1.
  • the apparatus 30 comprises a mechanical device wrapped inside a padding 33, where the mechanical device comprises a board 32 that may be vibrated via operation of a mechanical actuator 34.
  • the mechanical device may be applied to generate generating mechanical vibration directly to the padding, which results in producing vibration that can be felt on the outer surface of the padding 33 and radiating airborne sound through the padding 33.
  • an apparatus for reproducing sound and vibration comprising: a sound and vibration transmission assembly comprising a board and a padding coupled to the board for transmitting vibration of the board to its outer surface for perception via a contact to the outer surface and transmit audible sound for perception at a distance from the sound and vibration transmission assembly; and an actuator coupled to the board, where the actuator is arranged to vibrate the board in accordance with an audio signal, wherein the board has a structure that is arranged to provide enhanced reproduction of the audible sound via one or more predefined sub-areas of the board.
  • Figure 1 schematically illustrates a sound and vibration reproduction apparatus known in the art
  • Figure 2 illustrates a block diagram of some components of a sound and vibration reproduction arrangement according to an example
  • Figure 3A schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 3B schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 4A schematically illustrates a board according to an example
  • Figure 4B schematically illustrates a board according to an example
  • Figure 4C schematically illustrates a board according to an example
  • Figure 4D schematically illustrates a board according to an example
  • Figure 5A schematically illustrates a board according to an example
  • Figure 5B schematically illustrates a board according to an example
  • Figure 5C schematically illustrates a board according to an example
  • Figure 6A schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 6B schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 6C schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 6D schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 6E schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 6F schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 7A schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 7B schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 7C schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 8A schematically illustrates a sound and vibration reproduction apparatus according to an example
  • Figure 8B schematically illustrates a sound and vibration reproduction apparatus according to an example
  • Figure 8C schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 9A schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 9B schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 10A schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 10B schematically illustrates a cross-section of a sound and vibration reproduction apparatus according to an example
  • Figure 11 A schematically illustrates a cross-section of a sound and vibration transmission assembly according to an example
  • Figure 11 B schematically illustrates a cross-section of a sound and vibration transmission assembly according to an example
  • Figure 11 C schematically illustrates a cross-section of a sound and vibration transmission assembly according to an example
  • Figure 12A schematically illustrates a cross-section of a seat having a sound and vibration reproduction assembly integrated therein according to an example
  • Figure 12B schematically illustrates a cross-section of a seat having a sound and vibration reproduction assembly integrated therein according to an example.
  • Transmission of sound and vibration via operation of the sound and vibration reproduction apparatus may cover frequencies from a few Hz up to 20 kHz or even higher. Frequencies across this range may be, at least conceptually, considered as three frequency bands that have different contribution to perception by a user: tactile frequencies (e.g. from 1 to 50 Hz) that are perceivable as vibration on the surface of the padding 33, audio-tactile frequencies (e.g. from 50 to 300 Hz) that are perceivable both as vibration on the surface of the padding 33 and audible sounds radiated through the padding 33, and audible frequencies (e.g.
  • the audible frequencies may be further considered as two frequency sub-bands: intermediate audible frequencies (e.g. from 300 Hz to 2 kHz) and upper audible frequencies (e.g. from 2 to 20 kHz).
  • - tactile frequencies are typically transferred as vibrations that enable tactile perception throughout the outer surface of the padding 33 and they are typically further transferred to any support structures possibly coupled to the padding 33,
  • - audio-tactile frequencies are typically transferred as vibrations that enable tactile perception on a portion of the outer surface of the padding 33 that is spatially aligned with the board 32 and as audible sounds that enable audio perception through the portion of the outer surface of the padding 33 that is spatially aligned with the board 32,
  • intermediate audible frequencies are typically transferred as audible sounds that enable audio perception through a majority of the portion of the outer surface of the padding 33 that is spatially aligned with the board 32,
  • - upper audible frequencies are typically transferred as audible sounds that enables audio perception through a relatively small portion of the outer surface of the padding 33 that is spatially aligned with a location of the board 32 to which the actuator 34 is coupled.
  • FIG. 2 illustrates a block diagram of some (logical) components of a sound and vibration reproduction arrangement 100 according to an example.
  • the sound and vibration reproduction arrangement 100 is simply referred to as a sound reproduction arrangement 100, while simultaneous reproduction of both sound and vibration is implied.
  • the sound reproduction arrangement 100 according to the example of Figure 2 includes a signal processing assembly 101 and a sound and vibration reproduction apparatus 130, where the signal processing assembly 101 comprises a signal processing portion 110 and a control portion 120.
  • the signal processing portion 110 may be arranged to derive an output signal based on an input signal under control of the control portion 120, whereas the control portion 120 may be arranged control the derivation of the output signal at least in part in dependence of a control input signal.
  • control portion 120 may be arranged to generate one or more control signals at least in part in dependence of the input control signal, whereas the signal processing portion 110 may be arranged to derive the output signal in accordance with the one or more control signals.
  • the output signal from the signal processing assembly 101 may be supplied to the sound and vibration reproduction apparatus 130, which may be arranged to generate simultaneous sound and vibration accordingly.
  • the signal processing assembly 101 may be implemented by an apparatus that comprises a processor and a memory, where the memory is arranged to store computer program code that, when executed by the processor, causes the apparatus to operate as the signal processing apparatus 101.
  • Such an apparatus may be referred to as a computer or as a computing apparatus.
  • Each of the input signal and the output signal represents the sound and vibration
  • the signal processing portion 110 may derive the output signal based on the input signal in a manner that accounts for user preferences received in the control input signal while it may further account for (predefined) sound and vibration reproduction characteristics of the sound reproduction apparatus 130.
  • user preferences that may be received in the control input signal include a user-selected amplification to be applied to the input signal (e.g. a user-selected sound volume) and/or a user-selected emphasis to be applied for one or more frequency sub-bands (e.g. user-selected equalizer settings).
  • the input and output signals are predominantly referred to as input and output audio signals, respectively, even though a respective signal that represents both audio and vibration is implied.
  • Figures 3A and 3B schematically illustrate a cross-section of a sound and vibration reproduction apparatus 130 according to respective examples, where the sound and vibration reproduction apparatus 130 comprises a sound and vibration transmission assembly 131 and an actuator 134 for inducing vibrations to the sound and vibration transmission assembly 131.
  • the sound and vibration transmission assembly 131 may comprise a board 132 and a padding 133.
  • the actuator 134 may be mechanically coupled to the board 132 and it may be arranged to vibrate the board 132 in accordance with an audio signal supplied thereto (e.g. the output audio signal of the signal processing assembly 101 ), whereas the board 132 may be mechanically coupled to the padding 133 for transferring vibrations induced therein due to operation of the actuator 134 to the padding 133.
  • the board 134 may be also referred to as a vibratile board 132 or as a vibratable board 132.
  • the padding 133 may cover the board 132 in its entirety, e.g. enclose the board 132, whereas in some examples the padding 133 may cover the board partially such that at least a portion of the board 132 is left exposed.
  • the padding 133 may transmit the vibrations therethrough to enable tactile perception via a contact to its outer surface while the vibration of the board
  • the audible sound may be transmitted through the padding 133 and through its outer surface for perception by a user, whereas in other examples (described in the following) the audible sound may be additionally or alternatively transmitted via one or more openings provided in the padding 133.
  • the examples of Figures 3A and 3B further illustrate a base 135 to which the sound and vibration transmission assembly 131 is attached or mounted via the padding 133.
  • the vibrations induced to the board 132 may be also transmitted to the base 135 and possibly also to any further elements coupled to the base 135.
  • the base 135 may constitute an element of the sound and vibration reproduction assembly 130 or it may be an element of an entity to which the sound and vibration reproduction assembly 130 is mounted or integrated to.
  • the board 132 may comprise or it may be made of material that is rigid in comparison to the padding 133 in order to efficiently transmit the vibrations induced therein via operation of the actuator 134 to the padding 133, thereby enabling tactile perception on the outer surface of the padding 133 and provision of the audible sound through the outer surface of the padding 133.
  • the vibrations may propagate along the board 132 primarily as bending waves and they radiate from the board 132 to the padding 133 as longitudinal waves (e.g. as compression waves or shear waves).
  • the padding may propagate along the board 132 primarily as bending waves and they radiate from the board 132 to the padding 133 as longitudinal waves (e.g. as compression waves or shear waves).
  • the padding 133 may comprise or it may be made of substantially soft and flexible material that serves to dampen the vibrations received via the board 132 to a desired extent while also providing an interface for the user to receive the vibration in a convenient manner via a contact to the outer surface of the padding 133.
  • the padding 133 may transmit frequencies throughout the frequency spectrum, while the dampening effect provided by the padding 133 may be frequency dependent such that lower frequencies (e.g. the tactile frequencies that convey vibration) are attenuated less than higher frequencies (e.g. the audible frequencies that convey audible sound), the padding 133 thereby at least conceptually serving as a low pass filter for the vibrations induced to the board 132 via operation of the actuator 134.
  • Such characteristics of elements of the sound and vibration transmission assembly 131 enable tactile perception that truly complements the audio perception in a manner that avoids excessive vibration that may be perceived as inconvenient or even disturbing by the user while at the same time providing high quality reproduction of audible sounds.
  • the padding 133 may comprise a single-piece entity (e.g. a single padding portion) coupled to the board 132, whereas in another example the padding 133 may comprise two or more padding portions coupled to the board 132, where the two or more portions jointly serve as the padding 133.
  • the one or more padding portions that constitute the padding 133 may be made of the same material, whereas in another example the some of the padding portions may be made of a material different from that of the other padding portions and/or one or more padding portions may consist of two or more different materials.
  • each padding portion may have the characteristics described in the foregoing, e.g. each padding portion is a substantially soft and flexible element that serves to dampen the vibrations received via the board 132 to a desired extent while also providing an interface for the user to receive the vibration in a convenient manner via a contact to the outer surface of the padding 133.
  • the board 132 may comprise or it may be made of material substantially rigid material such as aluminum, plywood, medium density fiber (MDF) or plastic, whereas in another example the board 132 may comprise or it may be made of material such as dense felt.
  • the padding 133 may comprise or it may be made of material such as open cell foam, closed cell foam, memory foam, wadding, etc. Without losing generality, the padding 133 may be considered to have a front surface, which comprises a (first) predefined portion of the outer surface of the padding 133 that is intended for conveying the vibration to a user, thereby serving as a user interface in terms of tactile perception. Conversely, the padding 133 may be considered to have a back surface, e.g.
  • the board 132 may be considered to have a front side and a back side: the front side of the board 132 may be the one that is typically directed towards a main direction of vibrations to be transferred to the padding 133 (e.g. towards the front surface of the padding 133 or a major portion thereof), whereas the back side may be the side of the board 132 to which the actuator 134 is coupled.
  • front surface and back surface do not necessarily refer to a spatial relationship between the respective portions of the outer surface of the padding 133 but rather refer to respective roles of the outer surface of the padding 133, regardless of its shape and/or size.
  • front surface may be considered as the portion of the outer surface of the padding 133 intended for conveying the vibration at tactile (and possibly also audio-tactile) frequencies to the user, the vibration at these frequencies is typically also transmitted to other portions of the outer surface of the padding 133.
  • the board 132 is coupled to the back surface of the padding 133 such that its front side is facing the back surface of the padding 133, whereas sound and vibrations conveyed via the board 132 may be transmitted through the padding 133 at least to the front surface of the padding 133 for tactile perception by a user.
  • the board 132 and the actuator 134 are fully embedded within the padding 133 and hence the sound and vibration conveyed via the board 132 may be transmitted to the front surface of the padding 133 through a portion of the padding 133 located between the board 132 and the front surface, while other aspects of this example may be similar to the example of Figure 3A.
  • the front surface is indicated as a dashed line that substantially covers the portion of the outer surface of the padding 133 shown in left in the illustrations of the present disclosure. This is, however, a nonlimiting example that primarily serves to facilitate discussion concerning the front surface of the padding 133 in relation to other portions of the outer surface of the padding 133.
  • the actuator 134 may comprise a mechanical actuator known in the art that is arranged to exert a force that induces vibrations to the board 132 in accordance with the audio signal supplied to the actuator 134, thereby inducing to the board 132 vibrations that reproduce the audio signal.
  • the audio signal is supplied to the actuator 134 as an electrical signal.
  • the actuator 134 may comprise a component that is moveable with respect to one or more other components of the actuator 134 in accordance with the audio signal supplied to the actuator 134 and that is coupled to the board 132 such that movement of the component induces corresponding vibrations to the board 132.
  • the actuator 134 may comprise an arrangement of an electromagnet (e.g.
  • the electromagnet may be attached to the board 132 and it may be moveable with respect to the permanent magnet in accordance with the audio signal supplied thereto, thereby inducing the vibration that represents the audio signal to the board 132.
  • the board 132 may have a structure that is arranged to enhance reproduction of audible sounds, e.g. for enhanced reproduction of audible frequencies in general and for enhanced reproduction of the upper audible frequencies in particular, via one or more predefined sub-areas of the board 132, whereas the board 132 may be arranged with respect to the padding 133 such that the one or more sub-areas of the board at least partially spatially coincide with a portion of the front surface of the padding 133 intended for enhanced reproduction of audible sounds.
  • the arrangement of one or more such sub-areas to the board 132 enables spatial control of dispersive wave propagation (i.e. different propagation speed of vibration at different frequencies) of the bending waves along the board 132 for controlling directional and spatial properties of the audible sounds transmitted from the board 132.
  • the one or more sub-areas of the board 132 may comprise or it may be made of material that has an acoustic impedance and/or stiffness different from other parts of the board 132.
  • Figures 4A, 4B and 4C schematically illustrate respective examples of the board 132 provided with the one or more contiguous sub-areas 132b that have an acoustic impedance and/or stiffness different from a body 132a of the board 132, while also showing the position of the board 132 to which the actuator 134 is coupled (as a dashed rectangle).
  • the body 132a may be considered to represent the other parts of the board 132.
  • the one or more sub-areas 132a may or may not overlap the position of the board 132 to which the actuator 134 is coupled: since the different acoustic impedance and/or stiffness in the one or more sub-areas 132b of the board 132 in general serve to enhance transfer of vibrations at audible frequencies along the board 132, overlap between the one or more sub-areas 132b and the coupling position of the actuator 134 is not necessary, although such an overlap may further enhance transfer of vibrations at audible frequencies to and throughout the one or more subareas 132b.
  • Figures 4A to 4C provide a view to the front side of the board 132 according to the respective examples
  • Figure 4D schematically illustrates a cross-section of the board 132 according to three examples that are applicable across the examples of Figures 4A to 4C.
  • the illustration on the left depicts an example where the material that has a lower acoustical impedance and/or lower stiffness than the body 132a extends throughout the board 132 from its front side to its back side
  • the illustration in the middle depicts an example, where the material that has a lower acoustical impedance and/or lower stiffness than the body 132a is provided as a layer (partially) embedded to the body 132a on the front side (or a front surface) of the board 132 or on the back side (or a back surface) of the board 132 (whereas in a further example a respective layer of such material may be (partially) embedded to the body 132a on the front and back sides of the board 132),
  • the illustration on the right depicts an example, where the material that has a lower acoustical impedance and/or lower stiffness than the body 132a is provided as a layer (fully) embedded within the body 132a such that respective portions of the body 132 cover the layer on front side and on the back side of the board 132.
  • the board 132 may comprise one or more sound conduits that serve to enhance transfer of vibrations at audible frequencies along the board 132 within the one or more sub-areas described in the foregoing to facilitate enhanced reproduction of audible sounds through the spatially coinciding portion of the front surface of the padding 133 intended for enhanced reproduction of audible sounds.
  • FIGS 5A to 5C schematically illustrate respective examples of the board 132 provided with the one or more sub-areas 132b that have an acoustic impedance and/or stiffness different from the body 132a of the board 132 via application of a respective set of one or more sound conduits 132c arranged in the body 132a, while also showing the position of the board 132 to which the actuator 134 is coupled (as a dashed rectangle).
  • each sound conduit 132c may comprise or it may be made of material that has an acoustic impedance and/or stiffness that is different from those of the body 132a of the board 132 in order to facilitate enhanced transfer of vibrations at audible frequencies along the board 132.
  • a sound conduit 132c may comprise a fluid sound conduit where a fluid (e.g. air) serves to transfer the vibrations along the board 132
  • a sound conduit 132b may comprise a solid sound conduit where a solid material having acoustic impedance and/or stiffness that is different from those of the body 132a serves to transfer the vibrations along the board 132.
  • a sound conduit 132b may be provided as a surface sound conduit arranged on a surface (e.g. on the front surface) of the board 132 (e.g. in accordance with the illustration in the middle in the example of Figure 4D), whereas in another example a sound conduit 132b may be provided as an embedded sound conduit that is hidden under the surface of board 132 (e.g. in accordance with the illustration on the right in the example of Figure 4D).
  • the sound conduit 132c may involve one or more ‘outputs’ that extend to the front surface of the board 132.
  • a fluid sound conduit provided as a surface sound conduit may comprise a groove arranged on the body 132a on the (front) surface of the board 132, while a solid sound conduit provided as a surface sound conduit may be provided as suitable solid material partially embedded to the core 132a such that its surface remains visible in the (front) surface of the board 132 (while it may be covered by the padding 133).
  • a fluid sound conduit provided as an embedded sound conduit may comprise a ‘tunnel’ arranged within the core 132a, where the ‘tunnel’ may optionally include one or more openings to the front side (e.g.
  • the board 132 serving as the one or more ‘outputs’ described above, whereas a further opening to the back side (e.g. the back surface) provided at or close to a position of the board 132 to which the actuator 134 is coupled may serve as an ‘input’ to the respective embedded fluid sound conduit.
  • the board 132 is provided with the one or more sub-areas 132b (e.g.
  • the acoustic impedance and/or the stiffness of the one or more subareas 132b are typically lower than those of the other parts of the board 132, whereas in some examples the acoustic impedance and/or the stiffness of the board may be higher than those of the other parts of the board 132.
  • the one or more sub-areas 132b may further have vibration energy dissipation characteristics that are different from those of the other parts of the board 132 (e.g.
  • the core 132a of the board 132 where the energy dissipation characteristics are typically frequency dependent.
  • Such characteristic of the one or more sub-areas 132b may be applied for efficiently conducting the vibrations at audible frequencies and for damping resonances of the board 132.
  • the body 132a of the board 132 may comprise or consists of felt or another suitable acoustic damping material.
  • the board 132 may have a substantially non-planar shape that brings one or more portions of the board
  • FIG. 6A schematically illustrates a cross-section of the sound and vibration reproduction apparatus 130, where the board 132 comprises one or more protrusions 132d arranged on its front side (e.g.
  • FIGS. 6B and 6C schematically illustrate respective cross-sections of the sound and vibration reproduction apparatus 130 according to respective further examples, where the board 132 has a curved shape that brings at least one portion of the board 132 closer to the front surface of the padding 133 in positions of the board 132 that spatially coincides with the portion of the front surface of the padding 133 intended for enhanced reproduction of audible sounds.
  • protrusions 132d and/or a curved board shape may further serve to increase stiffness of the board 132 in respective portions of the board in a manner that makes the respective portions of the board 132 to facilitate enhanced reproduction of audible sounds in a manner described in the foregoing with references to the one or more sub-areas 132b of the board 132.
  • Figures 6D, 6E and 6F schematically illustrate respective cross-sections of the sound and vibration reproduction apparatus 130 according to respective further examples, where the board 132 has a varying thickness that brings one or more portions of the board 132 to proximity of the portion of the front surface of the padding 133 intended for enhanced reproduction of audible sounds: in the example of Figure 6D the board 132 has a substantially wedge-shaped cross-section, in the example of Figure 6E the board 132 has a ‘double-wedge’ shape with it thickness increasing from the center of the board 132 towards it edges, whereas in the example of Figure 6F the crosssection of the board 132 has a basically arbitrary shape.
  • the vibratile element may have a shape that does not strictly constitute a board.
  • board 132 is to be construed broadly, also encompassing vibratile elements that have a non-planar shape and/or varying thickness that are applicable for transferring vibrations to the padding 133.
  • Application of varying thickness of the board 132 may further serve to increase stiffness of the board 132 in respective portions of the board in a manner that makes the respective portions of the board 132 to facilitate enhanced reproduction of audible sounds in a manner described in the foregoing with references to the one or more sub-areas 132b of the board 132.
  • the board 132 may have a substantially homogenous structure apart from its non-planar shape, whereas in other examples the board 132 may be one provided with the one or more sub-areas 132b of the board 132 comprising or made of a material that has a lower acoustic impedance and/or stiffness than the other parts of the board 132 (e.g. according to the examples provided in the foregoing).
  • the one or more sub-areas of the board 132 may be co-located with the one or more portions of the board 132 that are brought to close(er) proximity of the portion of the front surface of the padding 133 intended for enhanced reproduction of audible sounds.
  • the board 132 is shown as an element having a substantially rectangular shape. This is, however, a non-limiting example chosen for the purpose of illustration and in other examples the board 132 may have a shape different from a rectangular one.
  • the shape may be or approximate a polygon such as a hexagon, octagon, a starpolygon, while in other examples the shape may be or approximate a non- polygonal shape such as a circle or an ellipse.
  • the shape me be an arbitrary one.
  • the board 132 and the padding 133 may be arranged with respect to each other in a manner that facilitates enhanced reproduction of audible sounds.
  • the board 132 may have a structure that facilitates enhanced reproduction of audible sounds, e.g. one described via examples provided in the foregoing with references to exemplifying illustrations of Figures 4A to 6F, whereas in other examples the board 132 may have a substantially planar shape and/or substantially homogenous structure.
  • Figures 7A and 7B schematically illustrate a cross-section of the sound and vibration reproduction apparatus 130 according to respective examples, where the board 132 is arranged with respect to the padding 133 such that at least a portion of an edge of the board
  • the exposed edge portion of the board 132 is exposed from the padding 133.
  • the exposed edge portion of the board 132 may be substantially aligned with the outer surface of the padding 133, in another example the edge portion of the board 132 may slightly protrude from the surface of the padding 133, whereas in a further example the exposed portion of the board 132 may be slightly below the surface of the padding 133. Regardless of the exact position of the edge portion of the board 132 with respect to the outer surface of the padding 133, such a positioning of the board 132 with respect to the padding 133 enables enhanced reproduction of audible sounds from the exposed edge portion of the board 132.
  • the edge portion of the board 132 may be exposed through a portion of the outer surface of the padding that does not belong to the front surface of the padding 133 intended for conveying the vibration to a user, thereby avoiding provision of intense vibration from the exposed edge portion via the front surface that is intended for transferring vibration via a user contact.
  • Figure 7C schematically illustrates a cross-section of the sound and vibration reproduction apparatus 130 according to an example, where the board 132 is arranged with respect to the padding 133 such that the front side of the board is directed towards a second portion of the outer surface of the padding
  • Figure 8A schematically illustrates a further example of arranging the board 132 and the padding 133 with respect to each other in a manner that facilitates enhanced reproduction of audible sounds.
  • the illustration on the left depicts a cross section of the sound and vibration transmission assembly 131 and the illustration on the right depicts a view towards the font surface of the padding 133 and towards the front side of the board 132, where the padding 133 is coupled to the board 132 such that the padding covers edge portions of the board 132 but the padding 133 includes an opening that leaves a center portion of the board 132 exposed (the larger dashed rectangle illustrates the outline of the board 132 while the smaller dashed rectangle illustrates the position of the board 132 to which the actuator 134 is coupled (on its back side).
  • Figure 8B schematically illustrate a variation of the example of Figure 8A, where the padding 133 comprises two substantially separate padding portions that cover respective (non-adjacent) edge portions of the board 132 and leaves an opening between the two padding portions, thereby leaving a portion of the board 132 exposed.
  • Figure 8C schematically illustrates a further example of arranging the board 132 and the padding 133 with respect to each other in a manner that facilitates enhanced reproduction of audible sounds.
  • the illustration on the left depicts a cross section of the sound and vibration transmission assembly 131 and the illustration on the right depicts a view towards the font surface of the padding 133 and towards the front side of the board 132, where the padding 133 is coupled to the board 132 such that a first padding portion covers edge portions of the board 132 at full thickness while a second padding portion covers the center portion of the board 132 at a reduced thickness.
  • the example of Figure 8C is similar to the example of Figure 8A apart from applying a padding portion of reduced thickness to cover the center portion of the board 132 instead of having the opening in the padding 133 to leave the center portion of the board 132 exposed.
  • the padding portion covering the center portion of the board 132 may have a substantially similar thickness with the padding portion covering the edge areas of the board 132, while the padding portion covering the center portion of the port may comprise or may be made of material that has a different (e.g. lower) acoustic impedance than the portion covering the edge areas of the board 132. Similar modifications are applicable to the example of Figure 8B as well, mutatis mutandis.
  • the vibration is perceivable via portion(s) of the padding 133 that cover at least some of the edge portions of the board 132 whereas the audible sound may be predominantly radiated from the center portion of the board 132 that is exposed via the opening in the padding 133 or covered by a padding portion of reduced thickness, thereby providing enhanced reproduction of audible sounds without compromising performance in terms of reproducing vibration.
  • the padding 133 may include one or more sound ducts for enhanced transmission of vibrations at audible frequencies from the board
  • the sound duct 133a may comprise (solid) material having acoustic impedance lower than that of bulk of the padding 133 that hence serves for enhanced transmission of vibrations at audible frequencies to the outer surface of the padding 133.
  • the lining layer 133b may serve to protect the padding 133 from and/or to provide improved user comfort and/or appearance, whereas in arrangements where the padding 133 leaves one or more portions of the board 132 exposed, the lining layer 133b may extend to protect the board 132 in those locations that are not covered by the padding 133. Although described herein as an entity separate of the padding 133, the lining layer 133b may be considered as part of the padding 133. In other words the padding 133 may comprise a padding layer (e.g. the padding 133 as described in the examples provided in the foregoing) that is at least partially covered by the lining layer 133b.
  • a padding layer e.g. the padding 133 as described in the examples provided in the foregoing
  • the lining layer 133b may comprise or it may be made of a material that transmits vibrations across the tactile frequencies, audio-tactile frequencies and audible frequencies substantially without further attenuation.
  • the lining layer 133b may comprise of consist of material such as textile or foam having a low air flow resistance, perforated leather, mesh fabric, etc.
  • Figure 10A schematically illustrates a crosssection of the sound and vibration reproduction apparatus 130 (according to the example of Figure 7A), where the padding 133 is covered by a lining layer 133b substantially in its entirety
  • Figure 10B schematically illustrates a cross-section of the sound and vibration reproduction apparatus 130 (according to the example of Figure 8A), where the front surface of the padding 133 is covered by the lining layer 133b.
  • the padding 133 may leave portions of the front side of the board 132 or even the front side of the board 132 in its entirety exposed such that the lining layer 133b may be arranged against the front side of the board 132 in those portions of the front side of the board 132 that are not covered by the padding 133 and, consequently, the lining layer 133b may further serve as the padding 133 for the respective portions of the board 132 at least in terms of transmitting the vibration of the board 132 to a user via contact on the outer surface of the lining layer 133b.
  • the padding 133 may be considered as one that includes the lining layer 133b without the actual padding layer.
  • the board 132 and the padding 133 are described as two separate elements with an arrangement where the padding 133 is (mechanically) coupled to the board 132.
  • the board 132 and the padding 133 may be construed as functional entities where the board 132 may receive the vibrations from the actuator 134 while the padding 133 may transmit the vibrations to its outer surface for tactile perception therein and possibly also for audible perception at a distance from the padding 133. Therefore, in some examples, the board 132 and the padding 133 may be at least partially integrated to each other, e.g.
  • the board 132 may also serve as the padding 133 or such that a portion of the padding 133 (e.g. on its back surface) may also serve as the board 132 arranged to receive the vibrations from the actuator 134.
  • the actuator 134 is described as an element that is separate from the sound and vibration transmission assembly 131.
  • the actuator may be integrated to the board 132 partially or in its entirety.
  • a partial integration between the actuator 134 and the board 132 may involve providing the moveable component of the actuator 134 as a part of the board 132, whereas in another example of partial integration the moveable component of the actuator 134 may serve as the board 132.
  • the moveable component of the actuator 134 serving as the vibratile element of the sound and vibration transmission assembly 131 may have a shape that does not strictly constitute a board, while it may serve to provide the functionality described for the board 132 in the present disclosure.
  • the actuator 134 may be arranged to exert the force that induces vibrations to the board 132 substantially in a right angle with respect to (the front side of) the board 132, which is schematically illustrated in Figure 11A by an arrow A.
  • the vibrations induced to the board 132 propagate along the board 132 predominantly as bending waves.
  • the actuator 134 may be arranged to exert the vibrationinducing force to the board 132 in an oblique angle, as schematically illustrated by the arrow A shown in Figure 11 B.
  • the vibrations induced to the board 132 propagate along the board 132 as a combination of bending waves and longitudinal waves, depending on the angle in which the force is exerted to the board 132.
  • the actuator 134 may be arranged to exert the vibration-inducing force to the board 132 at an edge of the board in a direction that is substantially aligned with (the front side of) the board 132, as schematically illustrated by the arrow A shown in Figure 11 C. In such an arrangement the vibrations induced to the board 132 propagate along the board 132 and from (the front side of) the board 132 predominantly as longitudinal waves.
  • arranging the actuator 134 to exert the vibration-inducing force to the board 132 in a desired position in a desired angle may enable transmitting the vibration and sound towards desired portions of the outer surface of the padding 133 and, consequently, also enhance reproduction of vibration on the front surface of the padding 133 and/or enhance reproduction of audible sounds through those portions of the outer surface of the padding 133.
  • the sound and vibration transmission assembly 131 that comprises a single board 132 coupled to the padding 133 in order to transmit vibrations at least via the front surface of the padding 133 may be implicitly assumed.
  • the sound and vibration transmission assembly 131 comprise one or more boards 132 that are mechanically coupled to the padding 133 in order to transfer vibrations induced to the one or more boards 132 to the padding 133.
  • each of the one or more boards 132 may be provided with a respective actuator 134, where each of the actuators 134 may be arranged to vibrate the respective one of the one or more boards 132 in accordance with the same audio signal.
  • the sound and vibration transmission assembly 131 may comprise two or more boards 132, each provided with a respective actuator 134, where each of the actuators 134 may be arranged to vibrate the respective one of the one or more boards 132 in accordance with a different audio signal.
  • the respective different audio signals supplied to the two or more actuators 134 may be based on the same audio signal such that they differ from each other in phase such that the vibrations induced to the padding 133 from the two or more boards 132 are steered to a desired direction, thereby directing transmission of vibration and sound towards desired portions of the outer surface of the padding 133 and, consequently, also enhancing reproduction of audible sounds through those portions of the outer surface of the padding 133.
  • Various approaches for controlling the respective phases of the two or more audio signals such that a desired directionality is provided are known in the art, for example, in context of beamforming applied for microphone arrays or antenna arrays.
  • a padding 133 having a substantially planar front surface.
  • the front surface may have, for example, a convex or concave shape, or the front surface may have a substantially arbitrary contour.
  • the 132 may at least loosely follow the shape of the front surface of the padding 133.
  • the front surface of the padding 133 may have a concave shape that forms a partial enclosure that enables both tactile perception and audible perception from a plurality of directions around a user positioned within the partial enclosure.
  • the respective illustrations of Figures 6A to 6F, 7A to 7C, 8A to 8C, 9A, 9B, 10A, 10B, 11A, 11 B and 11 C omit the base 135 shown in Figures 3A and 3B for improved graphical clarity of the illustrations.
  • the sound and vibration reproduction apparatus 130 making use of the sound and vibration transmission assembly 131 may be attached or mounted to the base 135, as described in the foregoing with references to the examples of Figures 3A and 3B.
  • attachment or mounting to the base 135 may be provided in multiple ways, for example according to one of the following examples:
  • the sound and vibration reproduction apparatus 130 may be detachably attached to the base 135 using a suitable attachment mechanism known in the art, such as Velcro or mounting straps, such that back surface of the padding 133 and/or the back side of the board 132 is mechanically coupled to the base 135,
  • the sound and vibration reproduction apparatus 130 may be embedded (in a non-detachable manner) to another entity that includes the base 135 such that back surface of the padding 133 and/or the back side of the board 132 is mechanically coupled to the base 135,
  • the sound and vibration reproduction apparatus 130 may be attached to or integrated into a chair or seat, such as an armchair for home or office use, a movie theatre seat, a seat of a vehicle such as a car seat, an airline seat, a seat of a bus or train, etc. whereas the sound and vibration reproduction apparatus 130 may be attached to or integrated into a backrest, a headrest, an armrest and/or a footrest of the seat.
  • Figures 12A and 12B schematically illustrate arrangement (e.g. integration) of the sound and vibration reproduction apparatus to a seat.
  • the seat comprises the sound and vibration reproduction apparatus 130 of a type described in the foregoing with references to Figure 7A, integrated to the seat such that the padding 133 serves as cushioning of the backrest of the seat and the padding 133 is attached to a body of the seat that serves as the base 135, while the lining layer 136 covers a portion of the padding 133 and portion of the body of the seat.
  • the seat comprises the sound and vibration reproduction apparatus 130 of a type described in the foregoing with references to Figure 7A, integrated to the seat such that the padding 133 serves as cushioning of the backrest and the headrest of the seat and the padding 133 is attached to a body of the seat that serves as the base 135, while the lining layer 136 covers a portion of the padding 133 and portion of the body of the seat while also covering the opening in the padding 133.
  • Attachment of the sound and vibration reproduction apparatus 130 to or its integration into a seat discussed above serve as a non-limiting example, whereas in other examples the sound and vibration reproduction apparatus 130 may be attached to or integrated into another entity to which a user may have a direct contact when exposed to reproduction of sound and vibration.
  • Non-limiting examples of such an entity include a sofa (e.g. a couch) or a part thereof, a footstool, a mattress, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Otolaryngology (AREA)
  • Pulmonology (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

Selon un mode de réalisation donné à titre d'exemple, un appareil (130) de reproduction de son et de vibration est fourni, l'appareil (130) comprenant : un ensemble de transmission de son et de vibration (131) comprenant une carte (132) et un rembourrage (133) couplé à la carte (132) pour transmettre une vibration de la carte (132) vers sa surface externe pour une perception par l'intermédiaire d'un contact avec la surface externe et transmettre un son audible pour une perception à distance de l'ensemble de transmission de son et de vibration (131) ; et un actionneur (134) couplé à la carte (132), l'actionneur (134) étant agencé pour faire vibrer la carte (132) conformément à un signal audio, la carte (132) ayant une structure qui est agencée pour fournir une reproduction améliorée du son audible par l'intermédiaire d'une ou plusieurs sous-zones prédéfinies (132b) de la carte (132).
PCT/EP2022/050431 2022-01-11 2022-01-11 Appareil de reproduction conjointe de son et de vibration WO2023134840A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/050431 WO2023134840A1 (fr) 2022-01-11 2022-01-11 Appareil de reproduction conjointe de son et de vibration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/050431 WO2023134840A1 (fr) 2022-01-11 2022-01-11 Appareil de reproduction conjointe de son et de vibration

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WO2023134840A1 true WO2023134840A1 (fr) 2023-07-20

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2900881A1 (fr) * 2006-05-09 2007-11-16 Tachi S Co Structure acoustique pour dossier de siege, notamment de vehicule
WO2015118217A1 (fr) 2014-01-24 2015-08-13 RESONOIVA design Oy Appareil de perception intégrale du son

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2900881A1 (fr) * 2006-05-09 2007-11-16 Tachi S Co Structure acoustique pour dossier de siege, notamment de vehicule
WO2015118217A1 (fr) 2014-01-24 2015-08-13 RESONOIVA design Oy Appareil de perception intégrale du son

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