WO1998016409A1 - Vehicle loudspeakers - Google Patents
Vehicle loudspeakers Download PDFInfo
- Publication number
- WO1998016409A1 WO1998016409A1 PCT/GB1997/002728 GB9702728W WO9816409A1 WO 1998016409 A1 WO1998016409 A1 WO 1998016409A1 GB 9702728 W GB9702728 W GB 9702728W WO 9816409 A1 WO9816409 A1 WO 9816409A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- panel
- sun visor
- loudspeaker
- vehicle
- attachment
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
- B60R11/0217—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers
- B60R11/0223—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers of flat type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
- B60R11/0217—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
- B60R2011/0003—Arrangements for holding or mounting articles, not otherwise provided for characterised by position inside the vehicle
- B60R2011/0035—Sun visors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/0043—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for integrated articles, i.e. not substantially protruding from the surrounding parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/0049—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for non integrated articles
- B60R2011/005—Connection with the vehicle part
- B60R2011/0059—Connection with the vehicle part using clips, clamps, straps or the like
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
Definitions
- This invention relates to vehicle loudspeakers, which may be used, for example, in in-vehicle hands-free communication systems such as telephone systems, and which may also be used in in-vehicle entertainment systems.
- the microphone and loudspeaker need to be, or are typically, widely separated.
- the microphone is attached to the windscreen pillar so as to be relatively close to the driver's mouth, whilst the loudspeaker is placed in the foot- well on the passenger side, i.e. on the other side of the driver to the microphone.
- This can cause an unwanted strain in a telephone conversation, because it is instinctive for the driver to turn towards the sound source, i.e. the foot-well loudspeaker, and away from the microphone.
- This therefore reduces the signal-to-noise ratio at the microphone and consequently reduces the conversation quality.
- the driver may be distracted from looking straight forward, thus reducing the overall safety of the vehicle and its occupants.
- an attachment for a vehicle sun visor being characterised by: a panel which can be vibrated to generate sound; a piezo-electric actuator coupled to the panel and operable to vibrate the panel in response to a driving signal so as to act as a loudspeaker; and means for attaching the panel to the sun visor.
- a sun visor for a vehicle comprising: a panel; and means for attaching the panel to the vehicle adjacent an upper edge of a windscreen of the vehicle; characterized in that: the panel is vibratable to generate sound; and a piezo-electric actuator is coupled to the panel and is operable to vibrate the panel in response to a driving signal so as to act as a loudspeaker.
- the loudspeaker By providing the loudspeaker as part of a vehicle sun visor, or as an attachment to a vehicle sun visor, the loudspeaker can be placed relatively close to the driver's ears and in front of the driver. Accordingly, there will not be any significant tendency for the driver to turn their head when listening to the loudspeaker.
- the loudspeaker can conveniently be integrated into a sun visor, or be provided as an unobtrusive attachment for a sun visor, in such a way that there is little likelihood of the sun visor or attachment causing any greater injury to the driver in the event of an accident than a conventional sun visor.
- the attaching means is arranged to one side of the panel for attaching the panel to the vehicle sun visor with said one side of the panel facing the sun visor.
- the attaching means comprises: a second panel hinged to the first-mentioned panel; and means for biasing the panels towards each other so that they can grip the vehicle sun visor therebetween.
- the attachment may further include a second piezo-electric actuator coupled to the second panel and operable to vibrate the second panel in response to the, or a further, driving signal so as to act as a second loudspeaker.
- the sun visor of the second aspect of the invention may further include a second panel generally parallel to the first-mentioned panel; the first-mentioned piezo-electric actuator, or a second piezo-electric actuator, being coupled to the second panel and operable to vibrate the second panel in response to the, or a further, driving signal so as to act as a second loudspeaker.
- the first- mentioned loudspeaker and the second loudspeaker may have substantially different frequency response characteristics. Accordingly, the two loudspeakers can be designed to provide a better overall frequency response.
- the attachment or vehicle sun visor may further include a microphone.
- a vehicle hands-free telephone system having a loudspeaker and a microphone, characterized in that the loudspeaker is provided by a vehicle sun visor attachment, or a vehicle sun visor, according to the first or second aspect of the invention.
- the microphone of the telephone system is preferably provided by the microphone of the attachment or sun visor.
- a vehicle having at least one of: (a) a sun visor, and an attachment therefor according to the first aspect of the invention; (b) a sun visor according to the second aspect of the invention; and (c) a telephone system according to the third aspect of the invention.
- Figure 1 is an isometric view of a conventional vehicle sun visor
- Figure 2 is an isometric view, on a larger scale and from one corner and behind, of a vehicle sun visor attachment of a first embodiment of the invention
- Figure 3 is an isometric view, from one corner and behind, of a vehicle sun visor attachment of a second embodiment of the invention
- Figure 4 is an isometric view, from one corner and behind, of a vehicle sun visor attachment of a third embodiment of the invention
- Figure 5 is an isometric view, on a smaller scale and from one corner and in front, of the vehicle sun visor attachment of figure 4 secured to a vehicle sun visor;
- Figure 6 is an isometric view of a vehicle sun visor attachment of a fourth embodiment of the invention.
- Figure 7 is a view of the cockpit of a motor vehicle, with the vehicle sun visor attachment of figure 6 secured to a sun visor of the vehicle;
- Figure 8 is an end view of a vehicle sun visor of a fifth embodiment of the invention, cross-sectioned on a section plane 8-8 shown in figure 9;
- Figure 9 is a view on a smaller scale of the sun visor of figure 8, cross-sectioned on a section plane 9-9 shown in figure 8;
- Figure 10 is a block diagram of an in-car hands-free telephone system which may employ a sun visor, or sun visor attachment, of any of the first to fifth embodiments of the invention.
- a conventional vehicle sun visor 10 comprises a rectangular panel 12 which is hinged adjacent and along one of its longer edges to an arm 14 of a crank 16.
- the other arm 18 of the crank 16 can rotate relative to a mounting plate 20, by which the sun visor 10 can be attached to a motor vehicle adjacent an upper edge of the vehicle windscreen.
- the attachments shown in figures 2 to 4 are intended to be secured to one side of the panel 12 of the sun visor 10 in the region denoted by the dot-dash line 22 in figure 1.
- the first embodiment of a loudspeaker attachment 24 for the sun visor 10 of figure 1 comprises a rectangular panel 26 formed from a sheet of, for example, aluminium, hardboard or plastics material, or from a composite of two thin sheets of such material between which a honeycomb- or foam-like material is sandwiched.
- a piezo-electric actuator is mounted on the rear face of the panel 26, and in the embodiment shown comprises two elements 28, each comprising a layer of piezoelectric material sandwiched between a pair of electrode layers, which are adhered to the rear face of the panel 26.
- the piezo-electric elements 28 are connected together, either in series or in parallel, by wires 30. When a driving signal is applied to the wires 30, the piezo-electric elements 28 cause the panel 26 to vibrate and thus to act as a loudspeaker.
- Fixing material 32 is provided around the marginal edge of the rear face of the panel 26, by which the loudspeaker attachment 24 can be attached to the sun visor 10 in the region 22.
- the fixing material 32 may be, for example, double-sided releasable adhesive tape, hook-and-loop tape (such as Velcro ® ) or magnetic tape. In the latter two examples, complementary tape is applied to the sun visor 10.
- the manner of fixing the loudspeaker attachment 24 to the sun visor 10 is preferably releasable, as in the examples given above, so that the loudspeaker attachment 24 can be removed from the vehicle if and when required.
- the loudspeaker attachment 24 can be attached to either side of the sun visor 10. It will be noted that the panel 26 is fixed to the sun visor 10 with the side of the panel 26 which bears the piezo-electric elements 28 facing the sun visor 10. Accordingly, the piezo-electric elements 28 are hidden. This has aesthetic advantages, together with providing added protection against accidental electric shock from the relatively high voltages used to drive the piezo-electric elements 28.
- the second embodiment is similar to the first embodiment of figure 2, except that a layer 34 of acoustic absorbing material is applied to the front face of the panel 26.
- the acoustic absorbing material could be provided by the sun visor itself.
- the high frequency components which can be generated by the flat panel loudspeaker 24 are not desirable, and the acoustic absorbing layer 34 is used to absorb the high frequencies and therefore improve the perceived quality of sound generated by the loudspeaker 24.
- electrical filtering may be employed.
- the third embodiment is similar to the second embodiment of figure 3, except in the following respect.
- the covering layer 34 which may or may not be of acoustic absorbing material, extends beyond the edges of the panel 26, and the fixing material 32 is secured to the marginal edge of the rear surface of the covering layer 34, with a gap 36 between the inner edge of the fixing material 32 and the outer edge of the panel 26.
- the material of the covering layer 34 is slightly stretchable. Therefore, as shown in figure 5, when the loudspeaker attachment 24 is applied to the sun visor 10, the marginal page of the covering layer 34 can be stretched so that the fixing material 32 can be secured to the panel 12 of the sun visor 10.
- the covering layer 34 need not be secured to the panel 12 of the sun visor 10 along all four edges, and, if secured along only two or three edges, then a pocket can be formed between the panel 26 of the loudspeaker attachment 24 and the panel 12 of the sun visor 10, into which other articles can be inserted. It has been found that the frequency response usually improves if the covering layer 34 is stretched tight.
- the loudspeaker attachment 24 of the fourth embodiment comprises a pair of the panels 26A,26B, which are hinged to each other along an edge of each of the panels 26A,26B, and a spring 38 urges the panels 26A,26B together in the direction denoted by the arrows 40.
- a respective one of the piezo-electric elements 28 is secured to each of the panels 26A,26B, and the piezoelectric elements 28 are connected together by wires (not shown) in a similar fashion to that described above with reference to figures 2 to 4.
- the loudspeaker attachment 24 forms a clip by which it can hold itself to a conventional sun visor 10, with the panel 12 of the sun visor 10 gripped between the spring-loaded panels 26A,26B of the loudspeaker attachment 24.
- a thin electrical protection film layer may be applied to the rear face of the loudspeaker attachment 24, and this may have the dual function of providing added protection against electrical shock as well as modifying and potentially smoothing the frequency response of the panel.
- the sun visor 10 comprises a rectangular frame 42 having, as seen in figure 9, a top limb 42T, a bottom limb 42B, and left and right limbs 42L,42R, which may be integrally formed or assembled from components.
- Two of the rectangular panels 26A,26B are positioned within the frame 42, with a gap 44 between the peripheries of the panels 26A,26B and the inside edge of the frame 42.
- the frame 42 and the panels 26A,26B are enveloped with a layer 34, which may or may not be of the acoustic absorbing material mentioned above, and which is adhered to the frame 42 and the outwardly-facing faces of the panels 26A,26B.
- the panels 26A,26B are held generally parallel and spaced apart.
- the top limb 42T of the frame has a bore 46 extending at least part way along its length from one end, and the crank 16 is tubular and its arm 14 is a sliding friction fit in the bore 46 so that the sun visor 10 can be pivoted up and down.
- Two of the piezo-electric elements 28 are secured to the inwardly-facing faces of each panel 26A,26B, and the four piezo-electric elements 28 are connected together in series and/or parallel by wires 30 which pass through an aperture 48 in the top limb 42T and through the tubular crank 16 so as to exit therefrom at the end connected to the mounting plate 20.
- a pair of notches 50 are formed halfway along the lower edges of the panels 26A,26B to accommodate a microphone 52 which is secured to the bottom limb 42B of the frame.
- Wires 54 for the microphone also pass through the aperture 48 in the top limb 42T of the frame and along the tubular crank 16.
- a hands-free in-car telephone system comprises a handset 56 which is releasably connected to a cradle 58. Audio signals are input to the handset 56 from a microphone 52 (see also figure 7) via wires 54, a junction box 64 and the cradle 58. Audio signals are output from the handset 56 via the cradle 58 and the junction box 64.
- the audio signals from the junction box 64 would be output to a conventional loudspeaker, such as a moving-coil loudspeaker.
- the transformer 66 increases the voltage of the signals output from the junction box 64 to a voltage suitable for driving the piezo-electric element(s) 28 of the flat panel loudspeakers.
- the transformer 66 might typically have a 10: 1 step-up ratio.
- a high-voltage amplifier may be used, the transformer 66 merely being an example of a technique to match the electrical requirement of a typical piezo-electric element with the electrical output of a typical hands-free telephone system.
- the junction box 64 could be re-engineered.
- the microphone 52 provided in the sun visor 10 of figures 8 and 9 may constitute the microphone 52 shown in figure 10.
- a hands-free in-car telephone system in which not only is the microphone positioned conveniently for the driver and so as to provide a high signal-to-noise ratio, but also the loudspeaker is positioned unobtrusively close to the driver so that the driver can more naturally use the system.
- sun visor attachments 24 of figures 2 to 6 may also be provided with microphones 52.
- the number of piezo-electric elements 28 provided on each panel 26; 26A,26B may be other than two, for example one, three or four.
- the piezo-electric elements 28 on each panel 26; 26A,26B may have different characteristics or be coupled to the panel differently, so that each produces a different frequency response characteristic so that the overall frequency response characteristic of the panel is more uniform.
- the sun visor attachments 24 described with reference to figures 2 to 4 may be provided in pairs, for attachment to either side of the panel 12 of the sun visor 10.
- the panels of each pair may have different frequency response characteristics so that the overall frequency response characteristic of the pair of panels is more uniform.
- the piezo-electric element(s) may be provided on only one of the panels 26A,26B.
- the piezo-electric elements 28 may bridge the space between the panels 26A,26B, so that each piezoelectric element 28 is directly coupled to both of the panels 26A,26B.
- the flat panel loudspeakers described above need not necessarily be used as part of a telephone system. Additionally or alternatively, they may be used in in-car entertainment systems o replace, or as an addition to, the conventional front loudspeakers. In this case, the driver's and front seat passenger's sun visors or attachments to them may be fed with left and right channels of a stereo signal. Even in the case of a telephone system, both the driver's and front seat passenger's sun visors may be provided with loudspeakers to facilitate the passenger listening to a telephone conversation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Telephone Set Structure (AREA)
- Traffic Control Systems (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Telephone Function (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/284,780 US6345102B1 (en) | 1996-10-16 | 1997-10-06 | Vehicle loudspeakers |
AU45657/97A AU4565797A (en) | 1996-10-16 | 1997-10-06 | Vehicle loudspeakers |
EP97944012A EP0932523B1 (en) | 1996-10-16 | 1997-10-06 | Vehicle loudspeakers |
DE69702320T DE69702320T2 (en) | 1996-10-16 | 1997-10-06 | SPEAKERS FOR VEHICLES |
AT97944012T ATE193868T1 (en) | 1996-10-16 | 1997-10-06 | SPEAKER FOR VEHICLES |
JP10518085A JP2001502270A (en) | 1996-10-16 | 1997-10-06 | Vehicle speaker |
CA002266361A CA2266361A1 (en) | 1996-10-16 | 1997-10-06 | Vehicle loudspeakers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9621523.1 | 1996-10-06 | ||
GBGB9621523.1A GB9621523D0 (en) | 1996-10-16 | 1996-10-16 | A flat panel loudspeaker arrangement and hands free telephone system using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998016409A1 true WO1998016409A1 (en) | 1998-04-23 |
Family
ID=10801481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/002728 WO1998016409A1 (en) | 1996-10-16 | 1997-10-06 | Vehicle loudspeakers |
Country Status (12)
Country | Link |
---|---|
US (1) | US6345102B1 (en) |
EP (1) | EP0932523B1 (en) |
JP (1) | JP2001502270A (en) |
KR (1) | KR20000049202A (en) |
AT (1) | ATE193868T1 (en) |
AU (1) | AU4565797A (en) |
CA (1) | CA2266361A1 (en) |
DE (1) | DE69702320T2 (en) |
ES (1) | ES2147028T3 (en) |
GB (1) | GB9621523D0 (en) |
MY (1) | MY124240A (en) |
WO (1) | WO1998016409A1 (en) |
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WO2000002415A1 (en) * | 1998-07-01 | 2000-01-13 | Alusuisse Kapa Gmbh | Loudspeaker |
WO2000005102A1 (en) * | 1998-07-24 | 2000-02-03 | Lear Corporation | Vehicle headliner assembly with integral speakers |
WO2001041498A2 (en) * | 1999-12-02 | 2001-06-07 | New Transducers Limited | Bending wave loudspeakers |
WO2001082648A2 (en) * | 2000-04-20 | 2001-11-01 | New Transducers Limited | Portable communications equipment |
US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
US6760461B2 (en) * | 1999-02-15 | 2004-07-06 | New Transducers Limited | Vehicle loudspeaker |
US7050593B1 (en) | 1999-08-25 | 2006-05-23 | Lear Corporation | Vehicular audio system and electromagnetic transducer assembly for use therein |
US7218745B2 (en) | 2002-12-23 | 2007-05-15 | Lear Corporation | Headliner transducer covers |
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US7853025B2 (en) | 1999-08-25 | 2010-12-14 | Lear Corporation | Vehicular audio system including a headliner speaker, electromagnetic transducer assembly for use therein and computer system programmed with a graphic software control for changing the audio system's signal level and delay |
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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 |
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US10639000B2 (en) | 2014-04-16 | 2020-05-05 | Bongiovi Acoustics Llc | Device for wide-band auscultation |
FR3089907A3 (en) * | 2018-12-14 | 2020-06-19 | Renault Sas | Arrangement of a telephony microphone device inside a motor vehicle |
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 |
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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 |
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US7346374B2 (en) * | 1999-05-26 | 2008-03-18 | Johnson Controls Technology Company | Wireless communications system and method |
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US20030040910A1 (en) * | 1999-12-09 | 2003-02-27 | Bruwer Frederick J. | Speech distribution system |
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US6991466B2 (en) * | 2003-01-27 | 2006-01-31 | Janet Marie Jewell | Note board apparatus and kit |
US7636447B2 (en) * | 2004-03-12 | 2009-12-22 | Multi Service Corporation | Acoustic bracket system |
US6959956B1 (en) * | 2004-06-02 | 2005-11-01 | Lear Corporation | Acoustically transparent visor |
US20060013417A1 (en) * | 2004-07-16 | 2006-01-19 | Intier Automotive Inc. | Acoustical panel assembly |
WO2007115992A2 (en) * | 2006-04-07 | 2007-10-18 | Vibration-X Di Bianchini Emanuele E C. Sas | Piezoelectric loudspeaker |
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US9877112B2 (en) * | 2016-03-29 | 2018-01-23 | Dell Products L.P. | Piezoelectric force actuator audio system |
WO2023283784A1 (en) * | 2021-07-12 | 2023-01-19 | 天津大学 | Piezoelectric mems loudspeaker system |
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DE4300433A1 (en) * | 1993-01-09 | 1994-07-14 | Philips Patentverwaltung | Radio |
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-
1996
- 1996-10-16 GB GBGB9621523.1A patent/GB9621523D0/en active Pending
-
1997
- 1997-10-06 US US09/284,780 patent/US6345102B1/en not_active Expired - Fee Related
- 1997-10-06 DE DE69702320T patent/DE69702320T2/en not_active Expired - Fee Related
- 1997-10-06 ES ES97944012T patent/ES2147028T3/en not_active Expired - Lifetime
- 1997-10-06 KR KR1019990703301A patent/KR20000049202A/en not_active Application Discontinuation
- 1997-10-06 AU AU45657/97A patent/AU4565797A/en not_active Abandoned
- 1997-10-06 CA CA002266361A patent/CA2266361A1/en not_active Abandoned
- 1997-10-06 JP JP10518085A patent/JP2001502270A/en not_active Ceased
- 1997-10-06 WO PCT/GB1997/002728 patent/WO1998016409A1/en not_active Application Discontinuation
- 1997-10-06 EP EP97944012A patent/EP0932523B1/en not_active Expired - Lifetime
- 1997-10-06 AT AT97944012T patent/ATE193868T1/en not_active IP Right Cessation
- 1997-10-15 MY MYPI97004852A patent/MY124240A/en unknown
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Cited By (43)
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US6411723B1 (en) | 1998-06-22 | 2002-06-25 | Slab Technology Limited | Loudspeakers |
WO2000002415A1 (en) * | 1998-07-01 | 2000-01-13 | Alusuisse Kapa Gmbh | Loudspeaker |
WO2000005102A1 (en) * | 1998-07-24 | 2000-02-03 | Lear Corporation | Vehicle headliner assembly with integral speakers |
US6555042B1 (en) | 1998-07-24 | 2003-04-29 | Lear Corporation | Method of making a vehicle headliner assembly with integral speakers |
US6760461B2 (en) * | 1999-02-15 | 2004-07-06 | New Transducers Limited | Vehicle loudspeaker |
US7853025B2 (en) | 1999-08-25 | 2010-12-14 | Lear Corporation | Vehicular audio system including a headliner speaker, electromagnetic transducer assembly for use therein and computer system programmed with a graphic software control for changing the audio system's signal level and delay |
US7050593B1 (en) | 1999-08-25 | 2006-05-23 | Lear Corporation | Vehicular audio system and electromagnetic transducer assembly for use therein |
WO2001041498A3 (en) * | 1999-12-02 | 2002-05-10 | New Transducers Ltd | Bending wave loudspeakers |
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WO2001082648A2 (en) * | 2000-04-20 | 2001-11-01 | New Transducers Limited | Portable communications equipment |
US7218745B2 (en) | 2002-12-23 | 2007-05-15 | Lear Corporation | Headliner transducer covers |
US7380858B2 (en) | 2004-03-05 | 2008-06-03 | Hayashi Engineering Inc. | Sun visor for automobile and sound absorbing structure for an automobile |
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US9564146B2 (en) | 2014-08-01 | 2017-02-07 | Bongiovi Acoustics Llc | System and method for digital signal processing in deep diving environment |
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 |
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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 |
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Also Published As
Publication number | Publication date |
---|---|
EP0932523B1 (en) | 2000-06-14 |
DE69702320T2 (en) | 2000-12-28 |
ES2147028T3 (en) | 2000-08-16 |
EP0932523A1 (en) | 1999-08-04 |
JP2001502270A (en) | 2001-02-20 |
US6345102B1 (en) | 2002-02-05 |
ATE193868T1 (en) | 2000-06-15 |
MY124240A (en) | 2006-06-30 |
DE69702320D1 (en) | 2000-07-20 |
GB9621523D0 (en) | 1996-12-04 |
CA2266361A1 (en) | 1998-04-23 |
AU4565797A (en) | 1998-05-11 |
KR20000049202A (en) | 2000-07-25 |
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