WO1999021397A1 - Haut-parleurs du type panneau a mode resonnant - Google Patents

Haut-parleurs du type panneau a mode resonnant Download PDF

Info

Publication number
WO1999021397A1
WO1999021397A1 PCT/GB1998/003131 GB9803131W WO9921397A1 WO 1999021397 A1 WO1999021397 A1 WO 1999021397A1 GB 9803131 W GB9803131 W GB 9803131W WO 9921397 A1 WO9921397 A1 WO 9921397A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
resonant
suspension means
form loudspeaker
suspension
Prior art date
Application number
PCT/GB1998/003131
Other languages
English (en)
Inventor
Graham Bank
Martin Colloms
Original Assignee
New Transducers Limited
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 New Transducers Limited filed Critical New Transducers Limited
Priority to AU95484/98A priority Critical patent/AU9548498A/en
Priority to KR1020007004251A priority patent/KR20010031264A/ko
Priority to CA002303789A priority patent/CA2303789A1/fr
Priority to AT98949102T priority patent/ATE266301T1/de
Priority to DE69823695T priority patent/DE69823695D1/de
Priority to BR9812949-0A priority patent/BR9812949A/pt
Priority to JP2000517579A priority patent/JP2001521353A/ja
Priority to EP98949102A priority patent/EP1036484B1/fr
Priority to IL13567798A priority patent/IL135677A0/xx
Publication of WO1999021397A1 publication Critical patent/WO1999021397A1/fr
Priority to HK00106173A priority patent/HK1027251A1/xx

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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

Definitions

  • the invention relates to loudspeakers and more particularly to panel-form loudspeakers of the kind adapted to be excited by launching bending waves into a resonant panel to cause it to resonate to produce an acoustic output.
  • loudspeakers are described in our International patent application WO97/09842, and are known as distributed mode loudspeakers.
  • a moving diaphragm In conventional pistonic loudspeakers, a moving diaphragm, usually a cone, is held in position on a frame or chassis by at least one flexible member which forms a resilient suspension.
  • This suspension performs at least the following functions, namely:- 1. location in the frame of an assembly comprising the diaphragm and a vibrator usually including a moving coil motor;
  • a resonant panel-form loudspeaker comprising suspension means located wholly in one or more panel regions of low average velocity.
  • suspension means may be used to suspend the panel in a support and/or to support a vibration exciter on the panel.
  • the support may comprise a surrounding area of the panel, which surrounding region may be acoustically inactive.
  • the resonant panel-form loudspeaker may comprise a panel having an acoustically active area and panel regions of low average velocity surrounding the acoustically active area, with slots or grooves in the panel structure defining the acoustically active area.
  • the slots or grooves may be such that they extend only partly through the panel structure.
  • the idea of using low energy regions of the panel for the mechanical support of the panel itself or of an exciter on the panel may be extended to include the use of slots or through incisions in the panel for the purpose of areal definition of a desired acoustically active panel area for distributed mode operation or at least desired acoustic vibration behaviour set within, or as a part of a larger panel component.
  • Such slotting will, for example, permit a wide range of distributed mode type vibrating panels to be produced as an integrated design with arbitrarily formed and contoured vehicle trim panels.
  • the slots may be of any suitable form or shape consistent with the desired vibration behaviour in the required frequency range.
  • FEA finite element analysis
  • the low vibration energy in the suspension regions has the benefit of allowing the use of stronger suspension elements than would otherwise be possible, so increasing the durability of the resulting assembly.
  • a compliant suspension may be created by incising the panel to form integral finger-like cantilever members.
  • the incisions may comprise a parallel pair of slots through the panel structure.
  • the cantilever members may be straight or otherwise, e.g. curved.
  • straight cantilevers might be preferred in order better to span the distance between areas of low average velocity and a region of high activity where the exciter is coupled to the panel.
  • the suspension may consist of an array of such cantilever members.
  • the panel may be incised to form cantilever members which retain stiffness in the plane of the panel and which are compliant in the plane of a frame or the like supporting the panel.
  • a separate compliant suspension e.g.
  • the rubber-like suspension may be mounted on the cantilevers.
  • the resonant panel -form loudspeaker may comprise a distributed mode acoustic radiator, e.g. of the kind defined in International patent application WO97/09842.
  • the invention is a decorative trim panel, e.g. for a vehicle or the like and incorporating a loudspeaker as defined above.
  • the invention is a vehicle, e.g. an automobile, comprising a loudspeaker as defined above or a decorative trim panel as defined above.
  • the invention is a method of making a resonant panel acoustic device characterised by identifying the location of at least one panel region of low average velocity and positioning suspension means within the said region (s) .
  • the method may comprise defining an acoustically active area of the panel by locating panel regions of low average velocity surrounding the acoustically active area and disrupting the panel structure in the said regions to form panel suspension means.
  • the method may comprise defining the acoustically active area by slotting the panel structure. The slots may be such that they extend only partly through the panel structure.
  • the method may further comprise identifying the desired panel location, e.g. an anti-node, for coupling the vibration exciter to drive the panel, and identifying one or more nodal regions adjacent to the drive location in which to position the exciter suspension.
  • desired panel location e.g. an anti-node
  • the method may comprise incising the panel material to define cantilevers forming the suspension means.
  • the suspension means may be such as to have at least three cantilevers .
  • Figure 1 is a cross-sectional side view through part of a resonant panel-form loudspeaker and showing a suspension for a vibration exciter;
  • Figure 2 is an underneath plan view to smaller scale of the resonant loudspeaker panel of Figure 1 ;
  • Figure 3 is an underneath plan view of a resonant loudspeaker panel showing three embodiments of vibration exciter suspension;
  • Figure 4 is a plan view of a panel incorporating a resonant panel-form loudspeaker
  • Figure 5 is a scrap plan view, to an enlarged scale, of detail V A' of Figure 4, and
  • Figures 6 and 7 are alternative scrap cross-sectional views on the line A-A of Figure 5.
  • a resonant panel-form loudspeaker 14 e.g. of the general kind described in International patent application WO97/09842 and comprising a resonant generally rectangular flat panel 1 usually of a stiff lightweight material forming an acoustic radiator and an inertial vibration exciter 4 mounted on the panel 1 to induce bending wave vibration in the panel to cause it to resonate to produce an acoustic output.
  • the panel may be of monolithic construction, but as shown comprises a cellular core 2 sandwiched between opposed face skins 3.
  • the inertial vibration exciter 4 comprises a voice coil/tubular coil former assembly 13 mounted, e.g. by bonding in a circular aperture 12 in the panel 1 whereby the assembly 13 extends from one face of the panel (the upper face as shown in Figure 1) and projects into an annular gap 15 in a magnet assembly 5,6,7 and defined between a disc-like pole piece 7 and a pole cap 6 which together sandwich a disc-like magnet 5.
  • the assembly comprising the magnet 5 and poles 6 and 7 is mounted on the panel 1 for axial movement relative to the coil/former assembly 13, when the coil is energised with a signal, on a compliant suspension attached to an annular flange 8 projecting from the cup 6 and comprising three equi-spaced rubber-like pads 9, only one of which is visible in Figure 1.
  • the pads 9 are mounted on finger-like cantilevers 10 formed by incising U-shaped slots 11 through the panel and equi-spaced round and concentric with the aperture 12 as best can be seen in Figure 2 in panel regions of low average velocity, such that the inner ends 16 of the cantilevers are free for movement normal to the plane of the panel 1.
  • the pads 9 are attached near to the free ends 16 of the cantilevers 10. It will be understood that, if desired, the pads 9 might be omitted and the magnet assembly 5,6,7 might instead be mounted directly on the cantilevers 10.
  • Figure 3 of the drawings show various alternative embodiments of cantilever for suspending a vibration exciter on the panel 1.
  • These include a single straight finger-like cantilever 10 defined by a U-shaped slot or incision 11 of the kind shown in Figures 1 and 2, a curved cantilever 17 defined by a spiral slot 18, and a resilient suspension comprising a cantilever member 19 defined between an opposed pair of arcuate slots 20 and having a central part circular portion 21 and an opposed pair of projections 22 attached at their distal ends to the panel, with the magnet system connected at a central position 23 of the portion 21.
  • Figures 4 to 7 disclose an embodiment of resonant panel-form loudspeaker 14 of the general kind described above and having a resonant panel 1 forming part of a larger panel 24, which may, for example, be a decorative trim panel in an automobile or the like vehicle.
  • the loudspeaker 14 has a rectangular resonant panel 1 defined within the larger panel 24 by grooves or slots 25, the panel 1 being suspended in the panel 24 by suspension cantilevers 27 defined by opposed parallel slots 26 arranged to bridge the slot 25 in regions round the panel 1 of low average velocity.
  • One cantilever is disposed on each side of the panel 1.
  • the vibration exciter 4 may be suspended as described above or conveniently as desired.
  • the slot 25 may extend only partly through the panel 1.
  • the slot 25 extends through the upper skin 3 and through the core 2 of the panel 1 to leave the lower skin intact and covering the slot.
  • the slot 25 may extend completely through the panel 1.
  • the slotting may be made at an early stage of manufacture, e.g. with laser or water jet cutting and the slots need only be wide enough to achieve a stable clearance for the vibrating component.
  • a width of 1mm or 2mm may generally be sufficient.
  • the width of the suspension component depends upon the effective cantilever length, the toughness and linear stiffness of the panel in that region and the acceleration forces which the whole assembly might be reasonably required to sustain. Values of about 4 to about 25mm have proved effective for cantilever width.
  • a relatively narrow slot width allow for a safe grounding of the panel in contrast to surface configurations using adhesive bonding to compliant suspension components. In this later case the suspension may suffer damage due to de-bonding.
  • the larger general panel may act as a baffle, generally augmented by local structures such as vehicle door frame or some overall framing and support. In an architectural application the structural panel will be augmented by the design of the room or building. Acoustic leakage via the narrow slots is likely to be negligible between front and back. Such low leakage is also beneficial in respect of stray noise isolation from the back to the front of the panel which may be important in some applications.
  • suspension can use same material as panel , so cost is low;
  • suspension may be located within the panel thickness, or with only a small increase of thickness
  • a number of such suspension positions can be found either to suspend the panel to the relatively stationary part of a vibration exciter, e.g. a magnet assembly, and/or to suspend the panel to a frame or other support, and,

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention concerne un haut-parleur sous forme d'un panneau résonnant caractérisé par des moyens de suspension placés dans au moins une région du panneau à vitesse moyenne lente. L'invention concerne également un procédé de fabrication d'un dispositif acoustique du type panneau résonnant, consistant à placer au moins une région du panneau à vitesse moyenne lente et à positionner des moyens de suspension dans cette (ces) région(s). Le procédé peut également consister à délimiter une zone active sur le plan acoustique d'un panneau plus grand, par exemple un panneau de garniture décoratif d'un véhicule à moteur, par l'exécution de rainures ou de fentes dans ce panneau, dans des régions de celui-ci à vitesse moyenne lente.
PCT/GB1998/003131 1997-10-21 1998-10-16 Haut-parleurs du type panneau a mode resonnant WO1999021397A1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AU95484/98A AU9548498A (en) 1997-10-21 1998-10-16 Resonant mode panel-loudspeakers
KR1020007004251A KR20010031264A (ko) 1997-10-21 1998-10-16 공진식 패널형 확성기
CA002303789A CA2303789A1 (fr) 1997-10-21 1998-10-16 Haut-parleurs du type panneau a mode resonnant
AT98949102T ATE266301T1 (de) 1997-10-21 1998-10-16 Resonanz-wellentyp paneellautsprecher
DE69823695T DE69823695D1 (de) 1997-10-21 1998-10-16 Resonanz-wellentyp paneellautsprecher
BR9812949-0A BR9812949A (pt) 1997-10-21 1998-10-16 Alto-falantes de painel de modo ressonsante
JP2000517579A JP2001521353A (ja) 1997-10-21 1998-10-16 共振モードパネルラウドスピーカ
EP98949102A EP1036484B1 (fr) 1997-10-21 1998-10-16 Haut-parleurs du type panneau a mode resonnant
IL13567798A IL135677A0 (en) 1997-10-21 1998-10-16 Resonant mode panel-loudspeakers
HK00106173A HK1027251A1 (en) 1997-10-21 2000-09-28 Resonant mode panel-loudspeakers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9722079.2A GB9722079D0 (en) 1997-10-21 1997-10-21 Loudspeaker suspension
GB9722079.2 1997-10-21

Publications (1)

Publication Number Publication Date
WO1999021397A1 true WO1999021397A1 (fr) 1999-04-29

Family

ID=10820766

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003131 WO1999021397A1 (fr) 1997-10-21 1998-10-16 Haut-parleurs du type panneau a mode resonnant

Country Status (14)

Country Link
EP (1) EP1036484B1 (fr)
JP (1) JP2001521353A (fr)
KR (1) KR20010031264A (fr)
CN (1) CN1271508A (fr)
AT (1) ATE266301T1 (fr)
AU (1) AU9548498A (fr)
BR (1) BR9812949A (fr)
CA (1) CA2303789A1 (fr)
DE (1) DE69823695D1 (fr)
GB (1) GB9722079D0 (fr)
HK (1) HK1027251A1 (fr)
IL (1) IL135677A0 (fr)
TW (1) TW410526B (fr)
WO (1) WO1999021397A1 (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373126A (en) * 2000-10-13 2002-09-11 New Transducers Ltd Loudspeaker driver with adapted natural resonance frequency
US6983819B2 (en) 2002-04-02 2006-01-10 Awi Licensing Company Entertainment sound panels
EP1895812A2 (fr) * 2006-08-30 2008-03-05 NEC Corporation Transducteur électro-acoustique
US7548854B2 (en) 2002-01-31 2009-06-16 Awi Licensing Company Architectural sound enhancement with pre-filtered masking sound
WO2010137988A1 (fr) * 2009-05-29 2010-12-02 Leiv Eiriksson Nyskapning As Agencement de haut-parleur
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
US9615189B2 (en) 2014-08-08 2017-04-04 Bongiovi Acoustics Llc Artificial ear apparatus and associated methods for generating a head related audio transfer function
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
US9741355B2 (en) 2013-06-12 2017-08-22 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US9793872B2 (en) 2006-02-07 2017-10-17 Bongiovi Acoustics Llc System and method for digital signal processing
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
US9906867B2 (en) 2015-11-16 2018-02-27 Bongiovi Acoustics Llc Surface acoustic transducer
US10069471B2 (en) 2006-02-07 2018-09-04 Bongiovi Acoustics Llc System and method for digital signal processing
US10158337B2 (en) 2004-08-10 2018-12-18 Bongiovi Acoustics Llc System and method for digital signal processing
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
US10701505B2 (en) 2006-02-07 2020-06-30 Bongiovi Acoustics Llc. System, method, and apparatus for generating and digitally processing a head related audio transfer function
US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US10848867B2 (en) 2006-02-07 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US10959035B2 (en) 2018-08-02 2021-03-23 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
US11202161B2 (en) 2006-02-07 2021-12-14 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
US11211043B2 (en) 2018-04-11 2021-12-28 Bongiovi Acoustics Llc Audio enhanced hearing protection system
US11431312B2 (en) 2004-08-10 2022-08-30 Bongiovi Acoustics Llc System and method for digital signal processing

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4565991B2 (ja) * 2004-12-24 2010-10-20 富士通テン株式会社 車両の内装板を振動板としたスピーカ装置及び内装板
JP4967725B2 (ja) * 2007-03-12 2012-07-04 ヤマハ株式会社 アレイスピーカ及びスピーカ装置
DE102015105330A1 (de) * 2015-04-08 2016-10-13 Ujet Vehicles S.À.R.L. Batteriebaugruppe und Motorroller mit einer Batteriebaugruppe
KR102215716B1 (ko) * 2019-10-21 2021-02-18 삼원액트 주식회사 음향재생기능을 갖는 패널

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1997009840A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1997009840A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Haut-parleurs comprenant un element rayonnant acoustique en forme de panneau

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373126A (en) * 2000-10-13 2002-09-11 New Transducers Ltd Loudspeaker driver with adapted natural resonance frequency
US7548854B2 (en) 2002-01-31 2009-06-16 Awi Licensing Company Architectural sound enhancement with pre-filtered masking sound
US6983819B2 (en) 2002-04-02 2006-01-10 Awi Licensing Company Entertainment sound panels
US10666216B2 (en) 2004-08-10 2020-05-26 Bongiovi Acoustics Llc System and method for digital signal processing
US10158337B2 (en) 2004-08-10 2018-12-18 Bongiovi Acoustics Llc System and method for digital signal processing
US10848118B2 (en) 2004-08-10 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US11431312B2 (en) 2004-08-10 2022-08-30 Bongiovi Acoustics Llc System and method for digital signal processing
US10848867B2 (en) 2006-02-07 2020-11-24 Bongiovi Acoustics Llc System and method for digital signal processing
US11202161B2 (en) 2006-02-07 2021-12-14 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function
US11425499B2 (en) 2006-02-07 2022-08-23 Bongiovi Acoustics Llc System and method for digital signal processing
US9793872B2 (en) 2006-02-07 2017-10-17 Bongiovi Acoustics Llc System and method for digital signal processing
US10701505B2 (en) 2006-02-07 2020-06-30 Bongiovi Acoustics Llc. System, method, and apparatus for generating and digitally processing a head related audio transfer function
US10069471B2 (en) 2006-02-07 2018-09-04 Bongiovi Acoustics Llc System and method for digital signal processing
EP1895812A3 (fr) * 2006-08-30 2010-03-17 NEC Corporation Transducteur électro-acoustique
EP1895812A2 (fr) * 2006-08-30 2008-03-05 NEC Corporation Transducteur électro-acoustique
WO2010137988A1 (fr) * 2009-05-29 2010-12-02 Leiv Eiriksson Nyskapning As Agencement de haut-parleur
US10999695B2 (en) 2013-06-12 2021-05-04 Bongiovi Acoustics Llc System and method for stereo field enhancement in two channel audio systems
US9741355B2 (en) 2013-06-12 2017-08-22 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US10412533B2 (en) 2013-06-12 2019-09-10 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US10917722B2 (en) 2013-10-22 2021-02-09 Bongiovi Acoustics, Llc System and method for digital signal processing
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
US10313791B2 (en) 2013-10-22 2019-06-04 Bongiovi Acoustics Llc System and method for digital signal processing
US11418881B2 (en) 2013-10-22 2022-08-16 Bongiovi Acoustics Llc System and method for digital signal processing
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
US10820883B2 (en) 2014-04-16 2020-11-03 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US10639000B2 (en) 2014-04-16 2020-05-05 Bongiovi Acoustics Llc Device for wide-band auscultation
US11284854B2 (en) 2014-04-16 2022-03-29 Bongiovi Acoustics Llc Noise reduction assembly for auscultation of a body
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
US9615189B2 (en) 2014-08-08 2017-04-04 Bongiovi Acoustics Llc Artificial ear apparatus and associated methods for generating a head related audio transfer function
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
US9906867B2 (en) 2015-11-16 2018-02-27 Bongiovi Acoustics Llc Surface acoustic transducer
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
US9998832B2 (en) 2015-11-16 2018-06-12 Bongiovi Acoustics Llc Surface acoustic transducer
US11211043B2 (en) 2018-04-11 2021-12-28 Bongiovi Acoustics Llc Audio enhanced hearing protection system
US10959035B2 (en) 2018-08-02 2021-03-23 Bongiovi Acoustics Llc System, method, and apparatus for generating and digitally processing a head related audio transfer function

Also Published As

Publication number Publication date
BR9812949A (pt) 2000-08-08
DE69823695D1 (de) 2004-06-09
TW410526B (en) 2000-11-01
KR20010031264A (ko) 2001-04-16
JP2001521353A (ja) 2001-11-06
IL135677A0 (en) 2001-05-20
AU9548498A (en) 1999-05-10
EP1036484A1 (fr) 2000-09-20
ATE266301T1 (de) 2004-05-15
CN1271508A (zh) 2000-10-25
HK1027251A1 (en) 2001-01-05
GB9722079D0 (en) 1997-12-17
EP1036484B1 (fr) 2004-05-06
CA2303789A1 (fr) 1999-04-29

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