WO1999052322A1 - Dispositif acoustique - Google Patents
Dispositif acoustique Download PDFInfo
- Publication number
- WO1999052322A1 WO1999052322A1 PCT/GB1999/001048 GB9901048W WO9952322A1 WO 1999052322 A1 WO1999052322 A1 WO 1999052322A1 GB 9901048 W GB9901048 W GB 9901048W WO 9952322 A1 WO9952322 A1 WO 9952322A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- panel
- cavity
- acoustic
- acoustic device
- enclosure
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims abstract description 30
- 238000005452 bending Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000004044 response Effects 0.000 description 32
- 238000005259 measurement Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000006870 function Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- 230000003993 interaction Effects 0.000 description 6
- 239000004417 polycarbonate Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 229920001821 foam rubber Polymers 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003012 network analysis Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; 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 acoustic devices and more particularly, but not exclusively, to loudspeakers incorporating resonant multi-mode panel acoustic radiators, e.g. of the kind described in our International application O97/09842. Loudspeakers as described in O97/09842 have become known as distributed mode (DM) loudspeakers.
- DM distributed mode
- the panel is placed in coupled contact with this active wave surface and the surface wave excitation of the panel excites the fluid. Conversely the natural wave properties of the fluid interact with the panel, so modifying its behaviour. This is a complex coupled system with new acoustic properties in the field.
- Figure 8 shows a DML panel system
- Figure 21 shows a microphone set up for measuring the internal pressure in the enclosure
- a panel in this form of deployment can provide a very useful bandwidth with quite a small enclosure volume with respect to the diaphragm size, as compared with piston speakers.
- the mechanisms responsible for the minimal interaction of this boundary with the distributed mode action are examined and it is further shown that in general a simple passive equalisation network may be all that is required to produce a flat power response. It is also demonstrated that in such a manifestation, a DML can produce a near-ideal hemispherical directivity pattern over its working frequency range into a 2Pi space.
- FIG. 7 The system under analysis is shown schematically in Figure 7.
- the front side of the panel radiates into free space, whilst the other side is loaded with an enclosure.
- This coupled system may be treated as a network of velocities and pressures are shown in the block diagram of Figure 8.
- the components are, from left to right; the electromechanical driving section, the modal system of the panel, and the acoustical systems.
- the normal velocity of the bending-wave field across a vibrating panel is responsible for its acoustic radiation.
- This radiation leads to a reacting force which modifies the panel vibration.
- the radiation impedance which is the reacting element, is normally insignificant as compared with the mechanical impedance of the panel.
- the effect of acoustic impedance due to its rear radiation is no longer small, and in fact it will modify and add to the scale of the modality of the panel.
- ⁇ P ⁇ ( X , y ) is the value of the i th plate eigen-function at the position where the velocity is observed.
- ⁇ p ⁇ ( XO ,yo) is the eigen-function at the position where the driving force F p ⁇ ⁇ J(a) is applied to the panel.
- the driving force includes the transfer functions of the electromechanical components associated with the driving actuator at (x 0 ,y 0 ), as for example exciters, suspensions, etc. Since the driving force depends on the panel velocity at the driving point, a similar feedback situation as with the mechanoacoustical coupling exists at the drive point (s), albeit the effect is quite small in practice. 13
- the indices, k and 1 are the enclosure cross-mode numbers in x and y direction, where Ldx and Ld y are enclosure dimensions in this plane.
- Ao is the area of the panel and
- Panels were mounted onto a back enclosure with adjustable depth using a soft polyurethane foam for suspension and acoustic seal.
- the enclosure depth was made adjustable on 16,28,40 and 53mm for set 'A' and on 20,50,95 and 130mm for set 'B' panels.
- Various measurements were carried out at different enclosure depths for every test case and result documented.
- Figure 25b shows the same panel as in Figure 25a but this time loaded with two identical enclosures, one on each side of the panel, with the same cross-section as the panel and a depth of 24mm.
- a double enclosure was designed and used in order to exclude the radiation impedance of free field on one side of the panel and make the experiment independent of the free field radiation impedance. It is important to note that this laboratory set-up was used for theory verification only.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Otolaryngology (AREA)
- Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL13831099A IL138310A0 (en) | 1998-04-07 | 1999-04-06 | Acoustic device |
EA200001038A EA200001038A1 (ru) | 1998-04-07 | 1999-04-06 | Акустическое устройство |
SK1493-2000A SK14932000A3 (sk) | 1998-04-07 | 1999-04-06 | Akustické zariadenie |
AU33400/99A AU3340099A (en) | 1998-04-07 | 1999-04-06 | Acoustic device |
CA002326193A CA2326193A1 (fr) | 1998-04-07 | 1999-04-06 | Dispositif acoustique |
KR1020007011113A KR20010042491A (ko) | 1998-04-07 | 1999-04-06 | 음향장치 |
HU0103916A HUP0103916A3 (en) | 1998-04-07 | 1999-04-06 | Acoustic device, loudspeaker comprising it and method of multiplying its modal behaviour |
EP99914672A EP1070437B1 (fr) | 1998-04-07 | 1999-04-06 | Dispositif acoustique |
BR9909496-7A BR9909496A (pt) | 1998-04-07 | 1999-04-06 | Dispositivo acústico |
PL99343440A PL343440A1 (en) | 1998-04-07 | 1999-04-06 | Acoustic device |
NZ506732A NZ506732A (en) | 1998-04-07 | 1999-04-06 | Acoustic device with a resonant multi mode acoustic panel with a cavity enclosing a portion of the panel |
JP2000542951A JP2002511681A (ja) | 1998-04-07 | 1999-04-06 | 音響装置 |
DE69932507T DE69932507T2 (de) | 1998-04-07 | 1999-04-06 | Akustisches gerät |
BG104811A BG104811A (en) | 1998-04-07 | 2000-09-29 | Acoustic device |
NO20005056A NO20005056L (no) | 1998-04-07 | 2000-10-06 | Akustisk innretning |
HK01101083A HK1030327A1 (en) | 1998-04-07 | 2001-02-14 | Acoustic device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9807316.6 | 1998-04-07 | ||
GBGB9807316.6A GB9807316D0 (en) | 1998-04-07 | 1998-04-07 | Loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999052322A1 true WO1999052322A1 (fr) | 1999-10-14 |
Family
ID=10829902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/001048 WO1999052322A1 (fr) | 1998-04-07 | 1999-04-06 | Dispositif acoustique |
Country Status (25)
Country | Link |
---|---|
EP (1) | EP1070437B1 (fr) |
JP (1) | JP2002511681A (fr) |
KR (1) | KR20010042491A (fr) |
CN (1) | CN100417304C (fr) |
AR (1) | AR019019A1 (fr) |
AT (1) | ATE334567T1 (fr) |
AU (1) | AU3340099A (fr) |
BG (1) | BG104811A (fr) |
BR (1) | BR9909496A (fr) |
CA (1) | CA2326193A1 (fr) |
DE (1) | DE69932507T2 (fr) |
EA (1) | EA200001038A1 (fr) |
GB (1) | GB9807316D0 (fr) |
HK (1) | HK1030327A1 (fr) |
HU (1) | HUP0103916A3 (fr) |
ID (1) | ID27518A (fr) |
IL (1) | IL138310A0 (fr) |
NO (1) | NO20005056L (fr) |
NZ (1) | NZ506732A (fr) |
PL (1) | PL343440A1 (fr) |
SK (1) | SK14932000A3 (fr) |
TR (1) | TR200002920T2 (fr) |
TW (1) | TW462201B (fr) |
WO (1) | WO1999052322A1 (fr) |
ZA (1) | ZA200004675B (fr) |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002104065A2 (fr) * | 2001-06-14 | 2002-12-27 | New Transducers Limited | Telephone mobile |
WO2003013186A1 (fr) * | 2001-07-13 | 2003-02-13 | Harman Becker Automotive Systems Gmbh | Haut-parleur a plaque |
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 |
US9906867B2 (en) | 2015-11-16 | 2018-02-27 | Bongiovi Acoustics Llc | Surface acoustic transducer |
US9906858B2 (en) | 2013-10-22 | 2018-02-27 | Bongiovi Acoustics Llc | System and method for digital signal processing |
US10069471B2 (en) | 2006-02-07 | 2018-09-04 | Bongiovi Acoustics Llc | System and method for digital signal processing |
US10129646B2 (en) | 2016-03-28 | 2018-11-13 | Lg Display Co., Ltd. | Panel vibration type sound generating display device |
US10158337B2 (en) | 2004-08-10 | 2018-12-18 | Bongiovi Acoustics Llc | System and method for digital signal processing |
US10409325B2 (en) | 2016-04-04 | 2019-09-10 | Lg Display Co., Ltd. | Panel vibration type sound generating actuator and double-faced display device including same |
US10555073B2 (en) | 2016-03-28 | 2020-02-04 | Lg Display Co., Ltd. | Panel vibration type sound generating display device |
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 |
US10848118B2 (en) | 2004-08-10 | 2020-11-24 | 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 |
US10847585B2 (en) | 2016-04-05 | 2020-11-24 | Lg Display Co., Ltd. | Organic light emitting display device including a sound generating apparatus |
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 |
AT525365B1 (de) * | 2022-05-25 | 2023-03-15 | Cale3D Prime Gmbh | Elektroakustischer Wandler |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4072542B2 (ja) * | 2005-03-14 | 2008-04-09 | Necアクセステクニカ株式会社 | スピーカ一体型ディスプレイ |
JP2010206557A (ja) * | 2009-03-04 | 2010-09-16 | Panasonic Corp | 建築材料 |
KR101496911B1 (ko) * | 2009-03-23 | 2015-02-27 | 삼성전자 주식회사 | 사운드 검사 시스템 및 그 방법 |
CN102711029A (zh) * | 2012-01-09 | 2012-10-03 | 瑞声声学科技(深圳)有限公司 | 一种麦克风固有噪声电压的测试方法及测试装置 |
US20200388265A1 (en) * | 2019-06-10 | 2020-12-10 | Toyota Motor Engineering & Manufacturing North America, Inc. | Sound isolation device |
KR102215716B1 (ko) * | 2019-10-21 | 2021-02-18 | 삼원액트 주식회사 | 음향재생기능을 갖는 패널 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989000798A1 (fr) * | 1987-07-13 | 1989-01-26 | Avm Hess, Inc. | Transducteur acoustique |
WO1997009859A1 (fr) * | 1995-09-02 | 1997-03-13 | New Transducers Limited | Transducteurs inertiels de vibrations |
WO1997009861A1 (fr) * | 1995-09-02 | 1997-03-13 | New Transducers Limited | Transducteur inertiel de vibrations |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
UA51671C2 (uk) * | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Акустичний пристрій |
-
1998
- 1998-04-07 GB GBGB9807316.6A patent/GB9807316D0/en not_active Ceased
-
1999
- 1999-04-06 NZ NZ506732A patent/NZ506732A/xx unknown
- 1999-04-06 SK SK1493-2000A patent/SK14932000A3/sk unknown
- 1999-04-06 ID IDW20001944A patent/ID27518A/id unknown
- 1999-04-06 KR KR1020007011113A patent/KR20010042491A/ko not_active Application Discontinuation
- 1999-04-06 DE DE69932507T patent/DE69932507T2/de not_active Expired - Lifetime
- 1999-04-06 AR ARP990101546A patent/AR019019A1/es unknown
- 1999-04-06 WO PCT/GB1999/001048 patent/WO1999052322A1/fr active IP Right Grant
- 1999-04-06 CN CNB998047651A patent/CN100417304C/zh not_active Expired - Fee Related
- 1999-04-06 AT AT99914672T patent/ATE334567T1/de not_active IP Right Cessation
- 1999-04-06 PL PL99343440A patent/PL343440A1/xx unknown
- 1999-04-06 CA CA002326193A patent/CA2326193A1/fr not_active Abandoned
- 1999-04-06 JP JP2000542951A patent/JP2002511681A/ja not_active Abandoned
- 1999-04-06 IL IL13831099A patent/IL138310A0/xx unknown
- 1999-04-06 AU AU33400/99A patent/AU3340099A/en not_active Abandoned
- 1999-04-06 TR TR2000/02920T patent/TR200002920T2/xx unknown
- 1999-04-06 HU HU0103916A patent/HUP0103916A3/hu unknown
- 1999-04-06 BR BR9909496-7A patent/BR9909496A/pt not_active Application Discontinuation
- 1999-04-06 EA EA200001038A patent/EA200001038A1/ru unknown
- 1999-04-06 EP EP99914672A patent/EP1070437B1/fr not_active Expired - Lifetime
- 1999-04-12 TW TW088105770A patent/TW462201B/zh not_active IP Right Cessation
-
2000
- 2000-09-06 ZA ZA200004675A patent/ZA200004675B/xx unknown
- 2000-09-29 BG BG104811A patent/BG104811A/xx unknown
- 2000-10-06 NO NO20005056A patent/NO20005056L/no not_active Application Discontinuation
-
2001
- 2001-02-14 HK HK01101083A patent/HK1030327A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989000798A1 (fr) * | 1987-07-13 | 1989-01-26 | Avm Hess, Inc. | Transducteur acoustique |
WO1997009859A1 (fr) * | 1995-09-02 | 1997-03-13 | New Transducers Limited | Transducteurs inertiels de vibrations |
WO1997009861A1 (fr) * | 1995-09-02 | 1997-03-13 | New Transducers Limited | Transducteur inertiel de vibrations |
Cited By (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002104065A3 (fr) * | 2001-06-14 | 2003-04-24 | New Transducers Ltd | Telephone mobile |
WO2002104065A2 (fr) * | 2001-06-14 | 2002-12-27 | New Transducers Limited | Telephone mobile |
WO2003013186A1 (fr) * | 2001-07-13 | 2003-02-13 | Harman Becker Automotive Systems Gmbh | Haut-parleur a plaque |
US7187776B2 (en) | 2001-07-13 | 2007-03-06 | Harman Becker Automotive Systems Gmbh | Planar loudspeaker |
US10848118B2 (en) | 2004-08-10 | 2020-11-24 | 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 |
US10666216B2 (en) | 2004-08-10 | 2020-05-26 | Bongiovi Acoustics Llc | System and method for digital signal processing |
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US10848867B2 (en) | 2006-02-07 | 2020-11-24 | Bongiovi Acoustics Llc | System and method for digital signal processing |
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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 |
US10999695B2 (en) | 2013-06-12 | 2021-05-04 | 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 |
US10313791B2 (en) | 2013-10-22 | 2019-06-04 | Bongiovi Acoustics Llc | System and method for digital signal processing |
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US10639000B2 (en) | 2014-04-16 | 2020-05-05 | Bongiovi Acoustics Llc | Device for wide-band auscultation |
US9615813B2 (en) | 2014-04-16 | 2017-04-11 | 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 |
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AT525365A4 (de) * | 2022-05-25 | 2023-03-15 | Cale3D Prime Gmbh | Elektroakustischer Wandler |
WO2023225697A1 (fr) | 2022-05-25 | 2023-11-30 | Cale3D Prime Gmbh | Transducteur électroacoustique |
Also Published As
Publication number | Publication date |
---|---|
HK1030327A1 (en) | 2001-04-27 |
ATE334567T1 (de) | 2006-08-15 |
CA2326193A1 (fr) | 1999-10-14 |
IL138310A0 (en) | 2001-10-31 |
AR019019A1 (es) | 2001-12-26 |
KR20010042491A (ko) | 2001-05-25 |
ZA200004675B (en) | 2002-02-27 |
HUP0103916A2 (hu) | 2002-03-28 |
SK14932000A3 (sk) | 2001-05-10 |
CN1296719A (zh) | 2001-05-23 |
TR200002920T2 (tr) | 2000-12-21 |
DE69932507D1 (de) | 2006-09-07 |
PL343440A1 (en) | 2001-08-13 |
NO20005056D0 (no) | 2000-10-06 |
TW462201B (en) | 2001-11-01 |
NZ506732A (en) | 2002-11-26 |
HUP0103916A3 (en) | 2002-12-28 |
EP1070437B1 (fr) | 2006-07-26 |
AU3340099A (en) | 1999-10-25 |
EP1070437A1 (fr) | 2001-01-24 |
BG104811A (en) | 2001-07-31 |
BR9909496A (pt) | 2000-12-12 |
EA200001038A1 (ru) | 2001-04-23 |
DE69932507T2 (de) | 2007-07-19 |
CN100417304C (zh) | 2008-09-03 |
ID27518A (id) | 2001-04-12 |
GB9807316D0 (en) | 1998-06-03 |
JP2002511681A (ja) | 2002-04-16 |
NO20005056L (no) | 2000-12-06 |
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