WO2018025064A1 - Dispositif et procédé de génération de rétroaction active - Google Patents

Dispositif et procédé de génération de rétroaction active Download PDF

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Publication number
WO2018025064A1
WO2018025064A1 PCT/IB2016/054710 IB2016054710W WO2018025064A1 WO 2018025064 A1 WO2018025064 A1 WO 2018025064A1 IB 2016054710 W IB2016054710 W IB 2016054710W WO 2018025064 A1 WO2018025064 A1 WO 2018025064A1
Authority
WO
WIPO (PCT)
Prior art keywords
enclosure
membrane
loudspeaker
user
tactile feedback
Prior art date
Application number
PCT/IB2016/054710
Other languages
English (en)
Inventor
Genaro Woelfl
Original Assignee
Harman Becker Automotive Systems Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harman Becker Automotive Systems Gmbh filed Critical Harman Becker Automotive Systems Gmbh
Priority to EP16757357.5A priority Critical patent/EP3494709B1/fr
Priority to PCT/IB2016/054710 priority patent/WO2018025064A1/fr
Publication of WO2018025064A1 publication Critical patent/WO2018025064A1/fr

Links

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
    • H04R1/20—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
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm 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
    • 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
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • H04R5/0335—Earpiece support, e.g. headbands or neckrests

Definitions

  • the disclosure relates to a device and a method for generating tactile feedback, in particular for generating tactile feedback for bass enhancement of loudspeaker devices, in particular for wearable loudspeaker devices.
  • a tactile sound device for producing vibrations that can be felt on the body enhance the sound perception, in particular the bass sound perception.
  • a tactile sound device also known as tactile transducer or bass shaker, for example, is designed to allow people to not only hear low bass frequencies, but also feel the low bass frequencies by transmitting low-frequency vibrations into various surfaces such as a chair on which a user is seated, for example.
  • a device for generating tactile feedback comprises an enclosure, at least one loudspeaker mounted in a wall of the enclosure between the inside and the outside of the enclosure and configured to produce sound waves, and at least one membrane mounted in a wall of the enclosure between the inside and the outside of the enclosure, wherein the pressure inside the enclosure changes depending on the sound waves, and wherein the at least one membrane is configured to be stimulated to vibrate depending on the pressure inside the enclosure and to be brought in contact with an object to provide tactile feedback.
  • a method for generating tactile feedback comprises generating sound waves within an enclosure using at least one loudspeaker that is mounted in a wall of the enclosure between the inside and the outside of the enclosure, wherein the pressure inside the enclosure changes depending on the sound waves, generating vibrations of at least one membrane mounted in a wall of the enclosure between the inside and the outside of the enclosure, wherein the vibrations of the at least one membrane are dependent on the pressure inside the enclosure, and providing tactile feedback by transferring the vibrations of the membrane to an object.
  • Figure 1 is a schematic diagram of a tactile loudspeaker device.
  • Figure 2 is a schematic diagram illustrating an exemplary wearable loudspeaker device and a user wearing the wearable loudspeaker device.
  • Figure 3 is a schematic diagram illustrating a wearable loudspeaker device including a device for tactile feedback that is worn by a user.
  • Figure 4 illustrates in a flow chart a method for generating tactile feedback in a loudspeaker device.
  • Figure 5 illustrates in diagrams different relative sound pressure levels for a loudspeaker with and without a device for tactile feedback.
  • Figure 6 illustrates in diagrams the total harmonic distortion and the relative sound pressure level during the measurement of the total harmonic distortion of a loudspeaker with and without a device for tactile feedback.
  • Figure 7 illustrates in diagrams an impedance curve of a loudspeaker under different conditions.
  • Figure 8 is a schematic diagram of another tactile loudspeaker device.
  • the loudspeaker device 100 includes a closed enclosure 110.
  • the enclosure 110 is illustrated having a rectangular cross section in Figure 1. However, this is only an example.
  • the enclosure 110 may have any cross section and any shape.
  • a loudspeaker 120 is mounted in a front panel of the enclosure 110 between the inside and the outside of the enclosure 110. This is, however, only an example.
  • the loudspeaker 120 may also be mounted in a back panel, sidewall or any other wall or baffle of the enclosure 110.
  • the loudspeaker 120 may be any transducer configured to convert electrical signals into sound waves.
  • the loudspeaker 120 may include a diaphragm attached to and driven by a voice coil, such as in a dynamic driver setup, a balanced armature setup, etc.
  • a voice coil such as in a dynamic driver setup, a balanced armature setup, etc.
  • a mechanical force causes the diaphragm to move back and forth, thereby reproducing sound under the control of the applied electrical signal.
  • the outward-facing surface of the diaphragm When moving back and forth, the outward-facing surface of the diaphragm generates sound waves at the front of the loudspeaker 120 outside of the enclosure 110, and the inward- facing surface of the diaphragm generates sound waves at the back of the loudspeaker 120 inside the enclosure 110.
  • the primary role of the enclosure 110 is to prevent the sound waves generated by the inward-facing surface of the diaphragm to interact with the sound waves generated by the outward-facing surface of the diaphragm.
  • the outward and inward generated sounds are usually out of phase with each other and an interaction between them generally results in cancellation of at least parts of the wanted sound signal.
  • the enclosure 110 may further prevent echo and reverberation effects.
  • a membrane 130 is mounted in a back panel of the enclosure 110 between the inside and the outside of the enclosure 110. This is, however, only an example.
  • the membrane 130 may also be mounted in a front panel, sidewall or any other wall or baffle of the enclosure 110.
  • the membrane 130 includes a passive membrane.
  • a passive membrane is a membrane that is stimulated through changes in the surrounding pressure only. No actuators are used for its stimulation. Therefore, when the pressure in the enclosure 110 changes due to the movement of the diaphragm of the loudspeaker 120, the membrane 130 is stimulated depending on the pressure inside the enclosure 110. This means that the membrane 130 moves around a resting position by a certain distance x.
  • the distance x may be variable depending on a current pressure inside the enclosure 110.
  • the distance x may further be dependent on the material, the thickness, the mass or the surface area of the membrane 130 and on how the membrane 130 is fixed to the enclosure 110.
  • the distance x may vary for different parts of the membrane.
  • the membrane 130 may include an elastic material such as rubber, latex, polypropylene, textile fabric or woven fabric, for example.
  • the membrane 130 may also include a material that is, at least virtually, not stretchable in one or multiple dimensions, but is still bendable such as glass fibre or carbon, for example.
  • the membrane 130 may be fixed to the enclosure 110 using a glue or an adhesive which may optionally also be flexible.
  • the fixation of the membrane to the enclosure may also include a flexible surrounding that supports movements, especially movements of membrane materials that are not or only slightly flexible or stretchable along their main dimensions (width and length). These are, however, only examples.
  • the membrane 130 may be fixed to the enclosure 110 in any other way that allows a vibration of the membrane 130 in response to a change of pressure within the enclosure 110.
  • Such membrane vibrations may include a movement of the whole membrane or only parts of the membrane.
  • the membrane weight may optionally be adjusted in combination with the stiffness and/or flexibility of the membrane and/or surrounding, to promote movement below certain frequencies or within certain frequency ranges by controlling inertia and/or a resonance frequency of the membrane.
  • the material or material mix of the membrane and/or surrounding may be chosen accordingly.
  • the thickness of at least parts of the membrane may be adjusted to control the membrane weight, flexibility and/or stiffness. Adjustments of thickness may induce thickness patterns that control the flexibility of the membrane.
  • Flexibility, shape, size and weight of the membrane may further be adjusted to control the distance x that the membrane moves out of its resting position at a given sound pressure level produced by the loudspeaker. This may be required in order to adjust the intensity of the tactile feedback to a level preferred by the majority of potential users.
  • the size and shape of the membrane may be adjusted to match parts of the human body for which tactile feedback shall be provided. [0019] When the membrane 130 is brought in contact with a user or the clothing of a user, for example, the user can feel the vibrations of the membrane 130. In this way, a tactile feedback can be provided to the user. This tactile feedback is dependent on the sound or music that is currently playing over the loudspeaker 120.
  • the loudspeaker 120 may be configured to reproduce low or very low frequencies, for example. Loudspeakers that are configured to reproduce low frequencies are generally known as woofers, whereas loudspeakers that are configured to generate very low frequencies are generally known as subwoofers, for example. Especially the low frequency perception can be greatly increased by providing tactile feedback to the user. When playing sound or music, it is generally necessary to also reproduce middle and high frequencies. Additional loudspeakers may be integrated in the same enclosure 110 or in different enclosures that are arranged adjacent or in close proximity to the enclosure 110.
  • Loudspeakers that are configured to generate middle frequencies are generally known as mid-range speakers and loudspeakers that are configured to generate high frequencies are also known as tweeters.
  • the perception of the lowest frequency range that a loudspeaker can support may be improved by providing tactile feedback.
  • maximum sound pressure levels that a loudspeaker is able to produce are reduced with a decreasing frequency of the sound signal.
  • the loudspeaker may no longer produce considerable sound pressure, but may still provide enough air pressure inside the enclosure to induce motion to the passive membrane. In this way, tactile feedback may enhance the perception of these frequencies.
  • the proposed method is not restricted to loudspeakers producing low frequencies, but may also be used for small fullrange loudspeakers, for example, which cover large parts of the audible frequency range and which are optionally used without any additional loudspeakers that could support frequency ranges outside the frequency range of the fullrange loudspeaker.
  • the enclosure 110 may be mounted on or may be part of a wearable loudspeaker device.
  • Different wearable loudspeaker devices are known. Referring to Figure 2, a wearable loudspeaker device 240 is illustrated that is configured to be worn around the neck of a user 200. The wearable loudspeaker device 240, therefore, may have a U-shape as is illustrated in Figure 2. Any other shape, however, is also possible.
  • the wearable loudspeaker device 240 for example, may be flexible such that it can be brought into any desirable shape.
  • the wearable loudspeaker device 240 may rest on the neck and the shoulders of the user 200, as is illustrated in Figure 2. This, however, is only an example.
  • the wearable loudspeaker device 240 may also be configured to only rest on the shoulders of the user 200 or may be clamped around the neck of the user 200 without even touching the shoulders. Any other location or implementation of the wearable loudspeaker device 240 is also possible. To allow the wearable loudspeaker device 240 to be located in close proximity of the ears of the user 200, the wearable loudspeaker device 240 may be located anywhere on or close to the neck, chest, back, shoulders, upper arm or any other part of the upper body of the user 200. Any implementation is possible that attaches the wearable loudspeaker device 240 in close proximity of the ears of the user 200. I.e., the wearable loudspeaker device 240 may be attached to the clothing of the user 200.
  • the wearable loudspeaker device 240 is implemented as one piece. However, the wearable loudspeaker device 240 may also include two parts (not illustrated), wherein one part is arranged to provide sound to the left ear and the other part is arranged to provide sound to the right ear. Each part may rest on one shoulder of the user 200, for example. In other embodiments the wearable loudspeaker device 240 may include even more than two parts.
  • the wearable loudspeaker device 240 may include at least one loudspeaker 220.
  • the wearable loudspeaker device 240 may include two loudspeakers 220R, 220L, one loudspeaker for each ear of the user 200.
  • the at least one loudspeaker 220 may be arranged at a first side of the wearable loudspeaker device 240.
  • the at least one loudspeaker 220 may be arranged to be in close proximity to the ear of a user 200.
  • the at least one loudspeaker 220 may, for example, be arranged on an upper side of the wearable loudspeaker device 240 which is closest to the ears of the user 200.
  • the membrane 130 may be arranged on the wearable loudspeaker device 240 such that it comes into contact with the user or the clothing of the user, for example, in order to provide tactile feedback.
  • the membrane 130 may be arranged at a bottom wall or a side surface of the wearable loudspeaker device 240, for example. The exact location of both the loudspeaker 120 and the membrane 130, however, depends on the form and implementation of the wearable loudspeaker device 240 and the part of the user's body to which tactile feedback should be provided.
  • One advantage of the proposed method compared to methods that cause vibration of the whole wearable device is that by adjusting the size, shape and position of the membrane 130, the parts of the human body to which the tactile feedback is provided may be chosen deterministically. For example, vibrations to the neck may be perceived as unpleasant by some users, especially near the carotid artery, while vibrations in the region of the collarbone may be perceived as pleasant and may enhance the listening experience. Therefore, the membrane 130 may be positioned such that it touches or avoids certain regions of the user's body. Furthermore, the membrane may reduce vibrations of the enclosure walls by reduction of the air pressure inside the enclosure. This can reduce vibrations that are felt on parts of the user's body where they are perceived as unpleasant.
  • Reduced enclosure vibrations may also improve the sound quality of the wearable loudspeaker device, as magnification and cancellation effects between the sound radiated by the loudspeaker membrane and the enclosure walls may be reduced.
  • More than one membrane 130 may be provided within one enclosure 110 to intensify the tactile feedback.
  • More than one loudspeaker 120 may be used to improve the listening experience of the user 200.
  • the wearable loudspeaker device 240 that is illustrated in Figure 3 has a rounded cross section. This, however, is only an example. Any other cross section such as rectangular, for example, is also possible. The cross section can also be irregular and uneven and may be adapted to align with the relevant parts of the user's body. [0023] Now referring to Figure 4, a method for providing tactile feedback is illustrated. First, using a loudspeaker 120, sound waves are generated (step 401). The sound waves are primarily generated at the outside of an enclosure 110, however, sound waves are also generated at the rear side of a loudspeaker 120 inside the enclosure 110. The sound waves inside the enclosure 110 effect a change of pressure inside the enclosure 110.
  • This change of pressure inside the enclosure 110 causes a vibration of a membrane 130 that is mounted in the same enclosure as the loudspeaker 120 (step 402).
  • Tactile feedback may be generated by transferring the vibrations of the membrane 130 to the body of a user (step 403).
  • the membrane 130 When the membrane 130 vibrates, it also produces some additional sound pressure outside the enclosure 110. This additional sound pressure is out of phase compared to the sound pressure that is generated outside the enclosure 110 by the at least one loudspeaker 120.
  • the additional sound pressure generated by the membrane 130 may reduce sound pressure that is produced by the loudspeaker 120. Therefore, the total sound pressure of the device may be slightly reduced when a passive membrane 130 is included in the device. Furthermore, the movement of the passive membrane caused by the air pressure inside the enclosure that is generated by the active loudspeaker 120 may induce mechanical losses to the complete system, thereby reducing the total sound pressure generated by the device. This is illustrated in the diagrams in Figure 5.
  • graph A illustrates the relative sound pressure level that is produced by the loudspeaker 120 when a sound is played and no additional membrane 130 is arranged in the enclosure 110.
  • Graph B illustrates the relative sound pressure level inside the enclosure when a membrane 130 is mounted in the same enclosure 110 and produces additional out-of-phase sound pressure.
  • the left diagram shows the case in which the membrane 130 is not in contact with a person, meaning that the membrane 130 can vibrate freely without any restrictions.
  • the sound pressure loss in this example is about 2 - 3dB. Sound pressure loss can vary depending on the size and geometry of the enclosure 110, the size of the loudspeaker and the size, flexibility or weight of the membrane, for example.
  • additional graph C illustrates the sound pressure loss when the membrane 130 is in contact with an object such as a human body, for example.
  • the distance x (see Figure 1) is generally smaller when the membrane 130 is brought into contact with an object.
  • the membrane 130 can move out of its resting position to a full extent when it is not in contact with an object, but is prevented to move out of its resting position to its full extent when it is in contact with an object because the object forms a barrier for the membrane 130.
  • the membrane movement is decreased, this also decreases the generation of additional sound pressure by the membrane 130.
  • the sound pressure loss decreases noticeably when the membrane 130 is brought into contact with an object. In the example of Figure 5, the sound pressure loss decreases to about only ldB.
  • the pressure in the enclosure 110 may change in a nonlinear way over the excursion range of the loudspeaker 120. This may lead to distortions in the sound produced by the loudspeaker 120.
  • the membrane 130 may have a certain nonlinear stiffness over its excursion range which may cause additional nonlinear air pressure changes inside the enclosure, thereby inducing additional distortion of the sound produced by the loudspeaker 120.
  • graph D illustrates the total harmonic distortion of the loudspeaker 120 for different frequencies when only the loudspeaker 120 is mounted in the enclosure 110.
  • Graph E illustrates the total harmonic distortion when a membrane 130 is additionally mounted in the enclosure 110.
  • the total harmonic content increases when a membrane 130 is mounted in the enclosure 110 in addition to the loudspeaker 120.
  • this increase of total harmonic distortion is moderate compared to the already rather high distortion of the loudspeaker 120.
  • distortion is actually reduced between 400Hz and 500Hz when including an additional membrane 130 into the device. This may be caused by damping of standing sound pressure waves inside the enclosure by the passive membrane 130 or the reduction of enclosure wall vibrations by air pressure reduction inside the enclosure caused by the passive membrane.
  • the loudspeaker 120 may be configured to produce low or very low frequencies. At low frequencies, the increase of total harmonic distortion may be greater than at high frequencies.
  • harmonics generated by the distortion process may actually support bass perception, as known from techniques that enhance bass perception through generation of harmonics. Therefore, harmonic distortion at low frequencies may at least be tolerable or even beneficial.
  • the total harmonic distortion may be reduced by motional or sound pressure feedback methods or by forward distortion reduction techniques, if desired. Such methods are known in the art and will not be explained in further detail.
  • graph F illustrates the relative sound pressure level during the total harmonic distortion measurement when there is only a loudspeaker 120 mounted in the enclosure 110.
  • Graph G illustrates the relative sound pressure level during the total harmonic distortion measurement when there is an additional membrane 130 mounted in the enclosure 110. As can be seen, the relative sound pressure level decreases when an additional membrane 130 is mounted in the enclosure 110.
  • Figure 7 illustrates different impedance curves over frequency.
  • the top diagram of Figure 7 illustrates the impedance curve of the original loudspeaker 120 (no additional membrane 130 mounted in the enclosure).
  • the middle curve illustrates the impedance curve when an additional membrane 130 is mounted in the enclosure 110.
  • the bottom curve illustrates the impedance curve when weight is added to the membrane 130.
  • the effect of the membrane 130 on the resonance frequency and resonance quality factor of the loudspeaker 120 within the enclosure 110 can be evaluated, for example, by means of the impedance curve measurement.
  • the resonance frequency is not affected.
  • the resonance quality in this example is slightly reduced by the membrane 130.
  • Added mass on the membrane 130 further increases this effect, as can be seen by means of the bottom diagram. Added mass may also further reduce sound pressure.
  • the additional mass that was added in the given example is not required for the function of the loudspeaker device 100.
  • Tactile feedback may be provided to any part of the user's body.
  • the membrane 130 may be in contact with the neck, shoulders, chest, back or upper arms of the user. These, however, are only examples.
  • the membrane 130 may provide tactile feedback to any other part of the user's body.
  • the loudspeaker device 100 includes more than one enclosure.
  • One example of such a loudspeaker device 100 is schematically illustrated in Figure 8.
  • a second enclosure 111 is arranged such that the loudspeaker 120 is mounted between the first enclosure 110 and the second enclosure 111.
  • a first surface of the loudspeaker diaphragm generates sound waves at the front of the loudspeaker 120 inside the second enclosure 110
  • a second surface of the loudspeaker diaphragm generates sound waves at the back of the loudspeaker 120 inside the first enclosure 110.
  • the loudspeaker 120 and the associated membrane 130 may generate sound waves at sound pressure levels that are not audible to the user.
  • the loudspeaker 120 may, additionally or alternatively, generate sound waves at frequencies which are not audible to the user. For example, very low frequencies are not audible to human ears.
  • the second enclosure 111 includes at least one second membrane 131 arranged between the inside and the outside of the second enclosure 111.
  • the at least one second membrane 131 may be mounted in a front panel, sidewall or any other wall or baffle of the second enclosure 111.
  • the at least one second membrane 130 includes a passive membrane. When the pressure in the second enclosure 111 changes due to the movement of the diaphragm of the loudspeaker 120, the second membrane 131 is stimulated depending on the pressure inside the second enclosure 111. This means that the second membrane 131 moves around a resting position by a certain distance y.
  • the distance y may be variable depending on a current pressure inside the second enclosure 111.
  • the distance y may further be dependent on the material, the thickness, the mass or the surface area of the second membrane 131 and on how the membrane 131 is fixed to the enclosure 110.
  • the distance y may vary for different parts of the membrane.
  • Each enclosure 110, 111 may be used to provide tactile feedback to different parts of the user's body.
  • the first enclosure 110 with the first membrane 130 may be configured to provide tactile feedback to the right shoulder of the user 200
  • the second enclosure 111 with the second membrane 131 may be configured to provide tactile feedback to the left shoulder of the user 200.
  • Tactile feedback may be provided to any other part of the user's body.
  • Such a device may include further enclosures and loudspeakers that are configured to generate sound that is audible for the user.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

L'invention concerne un dispositif destiné à générer une rétroaction tactile, ledit dispositif comprenant une enceinte, au moins un haut-parleur monté dans une paroi de l'enceinte entre l'intérieur et l'extérieur de l'enceinte et configuré pour produire des ondes sonores, et au moins une membrane montée dans une paroi de l'enceinte entre l'intérieur et l'extérieur de l'enceinte, la pression à l'intérieur de l'enceinte variant en fonction des ondes sonores, et la ou les membranes étant configurées pour être stimulées de façon à vibrer en fonction de la pression à l'intérieur de l'enceinte et pour être mises en contact avec un objet pour fournir une rétroaction tactile.
PCT/IB2016/054710 2016-08-04 2016-08-04 Dispositif et procédé de génération de rétroaction active WO2018025064A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16757357.5A EP3494709B1 (fr) 2016-08-04 2016-08-04 Dispositif et procédé de génération de rétroaction tactile
PCT/IB2016/054710 WO2018025064A1 (fr) 2016-08-04 2016-08-04 Dispositif et procédé de génération de rétroaction active

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2016/054710 WO2018025064A1 (fr) 2016-08-04 2016-08-04 Dispositif et procédé de génération de rétroaction active

Publications (1)

Publication Number Publication Date
WO2018025064A1 true WO2018025064A1 (fr) 2018-02-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021019925A1 (fr) * 2019-07-29 2021-02-04 ソニー株式会社 Haut-parleur portable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030012394A1 (en) * 2000-05-27 2003-01-16 Chun-Bong Lee Neckphone
WO2005053351A1 (fr) * 2002-07-31 2005-06-09 Jong Ha Lee Haut-parleur de graves vibrant en forme de u qui se porte sur les epaules
EP1933539A1 (fr) * 2006-12-15 2008-06-18 Nokia Corporation Appareil, procédé et produit de programme informatique fournissant un retour tactile produit par les sons
WO2010118313A1 (fr) * 2009-04-10 2010-10-14 Immerz Inc. Systèmes et procédés pour haut-parleurs acousto-haptiques
WO2013177587A2 (fr) * 2012-05-25 2013-11-28 Immerz Inc. Interface haptique pour dispositif électronique portable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030012394A1 (en) * 2000-05-27 2003-01-16 Chun-Bong Lee Neckphone
WO2005053351A1 (fr) * 2002-07-31 2005-06-09 Jong Ha Lee Haut-parleur de graves vibrant en forme de u qui se porte sur les epaules
EP1933539A1 (fr) * 2006-12-15 2008-06-18 Nokia Corporation Appareil, procédé et produit de programme informatique fournissant un retour tactile produit par les sons
WO2010118313A1 (fr) * 2009-04-10 2010-10-14 Immerz Inc. Systèmes et procédés pour haut-parleurs acousto-haptiques
WO2013177587A2 (fr) * 2012-05-25 2013-11-28 Immerz Inc. Interface haptique pour dispositif électronique portable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021019925A1 (fr) * 2019-07-29 2021-02-04 ソニー株式会社 Haut-parleur portable

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EP3494709B1 (fr) 2021-03-17
EP3494709A1 (fr) 2019-06-12

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