CN1140158C - Loudspeakers comprising a phase uncorrelated diffuse sound source - Google Patents
Loudspeakers comprising a phase uncorrelated diffuse sound source Download PDFInfo
- Publication number
- CN1140158C CN1140158C CNB998125431A CN99812543A CN1140158C CN 1140158 C CN1140158 C CN 1140158C CN B998125431 A CNB998125431 A CN B998125431A CN 99812543 A CN99812543 A CN 99812543A CN 1140158 C CN1140158 C CN 1140158C
- Authority
- CN
- China
- Prior art keywords
- pipeline
- loud speaker
- sound source
- plate
- coupled
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000005452 bending Methods 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 13
- 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
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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
- H04R7/045—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
-
- 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Multimedia (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Stereophonic System (AREA)
Abstract
A loudspeaker comprising a phase uncorrelated diffuse sound source and a duct or wave guide coupled to the sound source to direct acoustic energy from the source, the duct or wave guide having a substantially parallel section extending from the vicinity of the sound source and a termination positioned remotely from the panel.
Description
Technical field
The invention relates to loud speaker.
A project of the present invention be generator, whereby from the sound of loud speaker can channels direct to one or more remote locations.
Background technology
Knowing from WO98/43464 number that new transducer is limited to provides a kind of character for a main body is arranged, comprise the lid that a keyboard and is hinged to main body, and comprise the personal computing device of a display screen, be characterized as a resonant panel loud speaker or be attached to lid, and an acoustical waveguide or loudspeaker are in the acoustics output from loud speaker of the direction guiding of hope.
Summary of the invention
According to the present invention, a kind of loud speaker is provided, comprise a phase uncorrelated diffuse sound source, and a pipeline or waveguide, be coupled to sound source, to guide acoustic energy from the source, pipeline or waveguide have an actual parallel section near the extension of sound source, and a terminal that is positioned at away from plate.
Sound source can comprise a bending wave pattern acoustic radiation body plate.One transducer can be fixed on the plate, encouraging the resonance bending wave therein, is configured on frequency staggeredly with the resonance bending wave pattern of each axis connection of plate, and transducer position is chosen as and preferentially is coupled to resonance bending wave pattern.
Pipeline can form its section as a narrow slot, or can be the section shape of any other hope.
Pipeline can borrow a loudspeaker section to be stopped.
Plate can be arranged in pipeline with the acoustic radiation of coupling from the plate both sides.
One acoustic reflection device can be coupled to pipeline and be coupled to sound source, and acoustic radiation is directed into pipeline.
Pipeline can have many terminals, and these terminals can separate along pipeline enclosure.
Many plates can be coupled to pipeline.
Pipeline can fold.
Loud speaker can comprise an attenuator, and control is from the voice output of duct end.
But generator is for pipeline is divided into many waveguides along pipe extension again.Pipeline can be in two directions, that is laterally and vertically to distinguishing again.
One acoustic reflection device can be configured to guide the acoustics output from a duct end.
The involucrum device can be sealed an end face of plate.
The plane of plate can be parallel to the axis of pipeline.
Though the present invention was once illustrated with regard to loud speaker, should be understood that it can find other application, for example as microphone or as shock absorber, no matter be passive or active.
Description of drawings
The present invention schematically is shown in the accompanying drawing, is intended to as an example, in the accompanying drawings:
Fig. 1 is the elevation cross-sectional view of first embodiment of loud speaker of the present invention;
Fig. 2 is the cross sectional side view of the loud speaker of Fig. 1;
Fig. 3 is the elevation cross-sectional view of second embodiment of loud speaker of the present invention;
Fig. 4 is the side cutaway view of the 3rd embodiment of loud speaker of the present invention;
Fig. 5 is the side cutaway view of the 4th embodiment of loud speaker of the present invention;
Fig. 6 is the side cutaway view of the 5th embodiment of loud speaker of the present invention;
Fig. 7 is the side cutaway view of the 6th embodiment of loud speaker of the present invention;
Fig. 8 is the side cutaway view of the 7th embodiment of loud speaker of the present invention;
Fig. 9 is a kind of details of modification.
Embodiment
The present invention mainly is a sound source or generator, and for example flat resonance bending wave plate resembles in WO97/09842 number illustrated character, allow to be coupled to the acoustic fluid that is comprised to the shallow volume of the sound energy in a good coupling, normal is air, phase place uncorrelated, the stray radiation characteristic.With because path length difference, phase cancellation and the coupling aspect of the irregular and problematic relevant for example piston type device of power is greatly different subsequently, diffuse source allows the acoustic power good integration at its radiating surface, and power can be via being conducted via pipeline to the fluid coupling of remote spots.At this kind pipeline normally is serious mode resonance, owing to the uncorrelated character of the diffusion of the acoustic energy that enters pipeline alleviates.
But the duct end direct radiation if it becomes the form in a narrow slot or similar aperture, has wide directionality, and non-FREQUENCY CONTROL or frequency selectivity.Revise the directionality characteristic if desired, all size shape that then can this is known in the industry and the acoustic horn of combination add to the openend of pipeline.
The principle of diffusion coupling can expand to the simple individual reflection element of effect as remaining loudspeaker or section of tubing, and the length of pipeline can change to the loudspeaker section and almost directly provides to the diffuse source part.
A noticeable characteristic of the present invention for pipeline can be provided in the plane of radiant body, and is reached effective function.Also can distinguish and along more than one pipeline or waveguide guiding in the acoustic energy on the surface in source, and if after passing through along pipeline or waveguide, needed some outputs can smooth-goingly reconfigure, and it can be unequal length.
Can use twin flue, to be used to the energy of both sides, self-diffusion source.Preferable source is one or more pieces bending wave plates, but other these type of sources comprise small-sized traditional piston type loud speaker of the phase randomization signal of feeding of an array, or an array is by suitably being treated to the digital loudspeaker element that signal drove that the diffusion acoustic function is provided.Pipeline provides a kind of favourable integration function, and it can design as a low pass acoustic filter, to finish the response of hope from an array element digital loudspeaker.
Twin flue can landscape configuration, and at two disconnected positions, for example the passenger carriage along vehicle provides sound with single central authorities or the ectocentral sound producer of being positioned at.
Pipeline can be straight, and is crooked or folding, with allow a kind of elongated assembly be inserted in conventional loudspeakers the difficult locations that can't put.
Wide scope sound can be along pipeline transmission to actual little radiating aperture, for example in the slit of televimonitor side (normal is the pseudo-grid back that is contained in entrant sound).Tube performance can be distinguished by means of the cell formula in addition again and be strengthened, to suppress to intersect standing wave.
Pipeline and/or loudspeaker have a low frequency to be written into function, and it can use lumped parameter to give simple computation.This can favourablely be written into sound source, and borrowing the air quality of increases/coupling, and by in the baffle plate effect in the extension path length of related sound generator between before and after, range performance is hanged down in enhancing.
Plate or multiple plate (having identical or frequency selectivity/differential region area/form), or the back of multiple cone-shaped sound producer, but the back chamber of some or whole sealing strengthen for other resonance, and the frequency acoustic path between before and after the control.
Duct height and/or sectional area supply the smooth-going transmission of acoustic energy to have influence at definite upper frequency point.Therefore the rectangular duct of 30mm height will show some frequency dependences more than 10kHz, and the 10mm section will proceed to above 25kHz well.
Except laterally the distinguishing again of pipeline, the differentiation again of pipeline can extend to vertical direction, so that pipeline is distinguished more again, in upper frequency maintenance transmission performance.
The discharge area of the pipeline that diffuse source drove has influence to loudness, and with respect to the intrinsic area that exports, one variable area mechanism, such as a removable plate that hides from view on duct end, can provide convenience and the loudness control of effective form, and sound quality does not have remarkable loss.Behind mechanical loudness control device, can use a loudspeaker directionality element.Therefore the control of user's volume can be away from sound producer.Scheme can provide the pipeline control device in any position that makes things convenient for along pipeline as an alternative.
Pipeline of the present invention drives the loudspeaker terminal well, but and loudspeaker diffuse source can be provided direction-sense effectively and calculation control.Only duct end provides even wide-angle radiation, an almost ideal slit or near point source.
With regard to coincidence effect, it may be for the special design of bending wave plate, discrete Frequency point cause power from the axle limb, fluid coupling and pipeline integration, with acoustic energy configuration again, cause direction-sense coincidence effect no longer become the characteristic of the acoustics that obtains output.
Pipeline can be any length, and can provide terminal along the length of pipeline, to produce a kind of low level audio system of simple distribution.The multiple resonant panel pipeline of can feeding, and before pipeline, folding or crooked at the position of plate front, can be so as to making multiple plate configuration lighter and handier.
In the accompanying drawings, and please refer to Fig. 1 and 2, show a loud speaker 1, comprise one in international application WO97/09842 number of New TransducersLtd the resonance bending wave plate 2 of institute's general description character, it is driven from the feed vibration exciter 3 of electroacoustics signal of suitable acoustics amplifier (not shown) by one.Plate 2 is borrowed its rim elasticity to be installed in one to be positioned on the elasticity suspension apparatus 4 of shell 5, and shell 5 is the form of the shallow slit of parallel side pipeline 6, and a blind end 7 and an openend 8 are arranged, and it feeds an end and opens loudspeaker section 9 in opening or terminal 10.Shell can be from any suitable disresonance material, and such as the material of normal configuration loud speaker involucrum, for example medium density fibre board (MDF) or plastic cement make.Or pipeline can make at a kind of flexible material at least, with appropriate density, make its estimate the frequency range of purposes actual be disresonance.Therefore pipeline can become the form of high density polyethylene (HDPE) or fellow's flexible pipe for example.
Pipeline and loudspeaker section are borrowed along the circuit sectionalizer 12 of pipeline and the extension of loudspeaker section and are divided into several waveguides 11 again.
Fig. 3 shows one very similar in appearance to the embodiment of the loud speaker of Fig. 1 and 2.Yet, in this situation, within the pipeline 6 or blind end 7 forms as bending paraboloidal reflector for example, with acoustic radiation from the openend reflection of plate 2 to pipeline.Also at this embodiment, the direction that the plane of plate 2 is set at pipeline meets at right angles, and in Fig. 1 and 2, the plane of plate is configured in the direction of pipeline.Moreover at this embodiment, the loudspeaker section outwards opens or is crooked, and the embodiment in Fig. 1 and 2, the loudspeaker section is taper.
Fig. 4 show one usually as above in the speaker configurations as shown in Fig. 1 and 2, and a shell 5 that defines a parallel side pipeline 6 has an openend 8 that pipeline is stopped therein, reaches a blind end 7.Outer casing supporting one resonance bending wave plate 2 causes from one and is directed to a remote location towards the acoustic radiation of the face 17 that enters shell 5 plates along pipeline on an elasticity suspension apparatus 4, and wherein acoustic radiating is that openend from pipeline sends.
Loud speaker shown in Fig. 5 is except pipeline is stopped by loudspeaker 9, identical with person shown in Fig. 4.
The loud speaker of Fig. 6 is similar in appearance to Fig. 5's, but in this situation, be comprised in one by in the ante-chamber 14 that is defined with the involucrum 13 of shell 5 overall fixed from the acoustic radiation of the plate side 15 that deviates from pipeline, to prevent arriving surrounding environment from the radiation of the side 15 of plate 2.
Fig. 7 loud speaker is similar in appearance to Fig. 4 person, and in this situation, shell 5 defines a pair of opposed parallel side pipeline 6, each end face of one and plate 2 or side 15 connections, and pipeline in the opposite direction extends to its openend 8.
Fig. 8 is a kind of modification of the loud speaker of Fig. 7, and wherein two pipelines 6 each with the end face connection of plate 2, extend at equidirectional, and open relation at interval.
Fig. 9 represents, an acoustic reflection device 16 is placed near duct end, can be so as to the terminal 8 of the pipeline 6 of revising loud speaker as previously discussed, so that sound focuses on and at the direction guiding sound shown in the arrow.Therefore reflector is into the form of a paraboloidal reflector.Industrial applicability
Therefore the present invention provides a kind of simple loud speaker mechanism, for along pipeline transmission sound to remote location.
Claims (16)
1. loud speaker, comprise a sound source, can produce phase uncorrelated diffuse sound, and a pipeline or a waveguide, be coupled to sound source, with from sound source guiding acoustic energy, it is characterized in that, described pipeline or waveguide have first-class cross section section, from sound source extend and the extend through sound source near, and pipeline or waveguide end at the terminal away from sound source.
2. loud speaker as claimed in claim 1, wherein sound source comprises a bending wave pattern acoustic radiation body plate.
3. loud speaker as claimed in claim 2, comprise a transducer, be fixed to plate, to encourage the resonance bending wave therein, be configured to frequency interleave with the resonance bending wave pattern of different directions connection in the plate, and transducer position is chosen as and preferentially is coupled to resonance bending wave pattern.
4. loud speaker as claimed in claim 1, wherein pipeline is configured as shape as a narrow slot in the cross section.
5. loud speaker as claimed in claim 1, wherein pipeline is stopped by a loudspeaker section.
6. loud speaker as claimed in claim 1, wherein plate is positioned at pipeline, with the acoustic radiation of coupling from the plate both sides.
7. loud speaker as claimed in claim 1 comprises an acoustic reflection device, is coupled to pipeline and is coupled to sound source, so that acoustic radiation is directed to pipeline.
8. loud speaker as claimed in claim 1, wherein pipeline has many terminals.
9. loud speaker as claimed in claim 2 comprises many plates that are coupled to pipeline.
10. loud speaker as claimed in claim 1, wherein pipeline is folded.
11. loud speaker as claimed in claim 1 comprises a variable area damping mechanism, control is from the voice output of a duct end.
12. loud speaker as claimed in claim 1 comprises device, and pipeline is divided into many waveguides along pipe extension again.
13. as a kind of loud speaker of claim 12, wherein pipeline laterally with vertical to distinguishing again.
14. loud speaker as claimed in claim 1 comprises an acoustic reflection device, is configured to guide the acoustics output from duct end.
15. loud speaker as claimed in claim 2 comprises the involucrum device, seals an end face of plate.
16. loud speaker as claimed in claim 2, wherein the plane parallel of plate is in the axis of pipeline.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9824255.5A GB9824255D0 (en) | 1998-11-06 | 1998-11-06 | Loudspeakers |
| GB9824255.5 | 1998-11-06 | ||
| GB9914410.7 | 1999-06-22 | ||
| GBGB9914410.7A GB9914410D0 (en) | 1999-06-22 | 1999-06-22 | Reflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1324556A CN1324556A (en) | 2001-11-28 |
| CN1140158C true CN1140158C (en) | 2004-02-25 |
Family
ID=26314618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998125431A Expired - Fee Related CN1140158C (en) | 1998-11-06 | 1999-11-04 | Loudspeakers comprising a phase uncorrelated diffuse sound source |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP1125472B1 (en) |
| JP (1) | JP2002530031A (en) |
| KR (1) | KR20010083946A (en) |
| CN (1) | CN1140158C (en) |
| AT (1) | ATE256959T1 (en) |
| AU (1) | AU746872B2 (en) |
| BR (1) | BR9915048A (en) |
| CA (1) | CA2349856A1 (en) |
| DE (1) | DE69913726D1 (en) |
| HK (1) | HK1035987A1 (en) |
| IL (1) | IL142430A0 (en) |
| NZ (1) | NZ510972A (en) |
| RU (1) | RU2001115712A (en) |
| TW (1) | TW462203B (en) |
| WO (1) | WO2000028780A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6581719B2 (en) * | 2000-08-02 | 2003-06-24 | Alan Brock Adamson | Wave shaping sound chamber |
| US7735599B2 (en) * | 2003-03-25 | 2010-06-15 | Toa Corporation | Sound wave guide structure for speaker system and horn speaker |
| US7886869B2 (en) | 2007-09-27 | 2011-02-15 | Kevin Bastyr | Acoustic waveguide mode controlling |
| JP5188839B2 (en) * | 2008-02-28 | 2013-04-24 | 株式会社ジャムコ | Flat panel speaker |
| JP5276956B2 (en) * | 2008-11-13 | 2013-08-28 | 浜名湖電装株式会社 | Electric horn |
| JP5528569B2 (en) * | 2009-12-02 | 2014-06-25 | フラウンホッファー−ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー．ファオ | Flat speaker |
| JP6044164B2 (en) * | 2011-09-09 | 2016-12-14 | ヤマハ株式会社 | Sound equipment |
| CN108464010B (en) | 2016-01-14 | 2020-04-14 | 哈曼国际工业有限公司 | Multi-path acoustic wall coupling for surface-mounted speakers |
| JP7094687B2 (en) * | 2017-10-31 | 2022-07-04 | 川崎車両株式会社 | Railroad horn device |
| CN115022758A (en) * | 2019-09-20 | 2022-09-06 | 广州视源电子科技股份有限公司 | Electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2956636A (en) * | 1956-06-11 | 1960-10-18 | Sipko L Boersma | Loudspeaker |
| KR910004063A (en) * | 1988-07-28 | 1991-02-28 | 파브리-꽁띠 루까 | Apparatus and method for reproducing high fidelity sound |
| UA51671C2 (en) * | 1995-09-02 | 2002-12-16 | Нью Транзд'Юсез Лімітед | Acoustic device |
| GB9705981D0 (en) * | 1997-03-22 | 1997-05-07 | New Transducers Ltd | Personal computers |
-
1999
- 1999-11-04 IL IL14243099A patent/IL142430A0/en unknown
- 1999-11-04 CN CNB998125431A patent/CN1140158C/en not_active Expired - Fee Related
- 1999-11-04 KR KR1020017005572A patent/KR20010083946A/en not_active Application Discontinuation
- 1999-11-04 NZ NZ510972A patent/NZ510972A/en unknown
- 1999-11-04 BR BR9915048-4A patent/BR9915048A/en not_active Application Discontinuation
- 1999-11-04 WO PCT/GB1999/003613 patent/WO2000028780A1/en not_active Application Discontinuation
- 1999-11-04 RU RU2001115712/09A patent/RU2001115712A/en not_active Application Discontinuation
- 1999-11-04 CA CA002349856A patent/CA2349856A1/en not_active Abandoned
- 1999-11-04 JP JP2000581851A patent/JP2002530031A/en active Pending
- 1999-11-04 DE DE69913726T patent/DE69913726D1/en not_active Expired - Lifetime
- 1999-11-04 AU AU64806/99A patent/AU746872B2/en not_active Ceased
- 1999-11-04 AT AT99952692T patent/ATE256959T1/en not_active IP Right Cessation
- 1999-11-04 EP EP99952692A patent/EP1125472B1/en not_active Expired - Lifetime
- 1999-11-11 TW TW088119775A patent/TW462203B/en not_active IP Right Cessation
-
2001
- 2001-09-15 HK HK01106541A patent/HK1035987A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1125472A1 (en) | 2001-08-22 |
| IL142430A0 (en) | 2002-03-10 |
| TW462203B (en) | 2001-11-01 |
| NZ510972A (en) | 2002-07-26 |
| RU2001115712A (en) | 2003-06-10 |
| CN1324556A (en) | 2001-11-28 |
| CA2349856A1 (en) | 2000-05-18 |
| JP2002530031A (en) | 2002-09-10 |
| HK1035987A1 (en) | 2001-12-14 |
| WO2000028780A1 (en) | 2000-05-18 |
| AU6480699A (en) | 2000-05-29 |
| BR9915048A (en) | 2001-08-07 |
| AU746872B2 (en) | 2002-05-02 |
| KR20010083946A (en) | 2001-09-03 |
| ATE256959T1 (en) | 2004-01-15 |
| DE69913726D1 (en) | 2004-01-29 |
| EP1125472B1 (en) | 2003-12-17 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040225 Termination date: 20131104 |