WO1992007448A1 - Procede pour ameliorer la qualite de la restitution d'une ambiance sonore, et appareil de mise en ×uvre comportant au moins un haut-parleur emettant dans trois directions - Google Patents
Procede pour ameliorer la qualite de la restitution d'une ambiance sonore, et appareil de mise en ×uvre comportant au moins un haut-parleur emettant dans trois directions Download PDFInfo
- Publication number
- WO1992007448A1 WO1992007448A1 PCT/FR1991/000803 FR9100803W WO9207448A1 WO 1992007448 A1 WO1992007448 A1 WO 1992007448A1 FR 9100803 W FR9100803 W FR 9100803W WO 9207448 A1 WO9207448 A1 WO 9207448A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cavity
- transducer
- tube
- emission
- transducers
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
- H04R1/347—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers for obtaining a phase-shift between the front and back acoustic wave
Definitions
- Method for improving the quality of the reproduction of a sound environment comprising at least one loudspeaker emitting in three directions.
- the present invention relates to a method making it possible to improve the quality of the reproduction of a sound environment, in mono or in stereophony.
- These devices generally include two “enclosures” comprising one or more electro ⁇ acoustic transducers called “loudspeakers”.
- Each speaker generally includes three speakers each ensuring the transmission of different frequencies, low, mid or high. These speakers use different materials or technologies in order to improve the transmission of sound.
- the "timbres" of these speakers are now very close to reality, but the problem of spatiality is not resolved. These speakers do not faithfully reproduce the recorded sounds, and this is due to the fact that they only emit in one direction which is always perpendicular to the open face of the speaker and in the same direction as the divergent of the conical diaphragm of the loudspeaker (this single direction corresponds to the emission called E j below, see in particular FIG. 1). Indeed, these speakers are cavities closed on five sides and the speakers are always placed opposite the open face, that is to say that the main axis of the conical membrane of the speaker is always perpendicular to this open face of the cavity.
- the object of the present invention is to ensure a homogeneous reproduction of the sounds and to improve the finesse and more particularly the spatiality of these sounds, by creating an asymmetry of acoustic pressure between the different directions of emission.
- the subject of the present invention is a method for restoring a sound environment using at least one electro-acoustic transducer which can be of any known type.
- this method consists in causing this or these transducers to be emitted in three perpendicular directions, a frontal emission (E j ), a bitter emission (E2) and a lateral emission (E3) in quadrature with the other two.
- this method consists in causing a transducer to be emitted in the three directions, the three emission zones then being completely sealed from one another.
- this method consists in causing a transducer to be emitted in two directions, the two emission zones being tight towards one another, and a transducer in a third direction corresponding to a lateral emission.
- the present invention also relates to an apparatus allowing the reproduction of a sound environment, comprising at least one electro-acoustic transducer, a tube open at its two ends and in which the transducer is placed perpendicular to the axis of the tube.
- this device comprises a cavity open on one face, the main axis of the transducer being parallel to the open face of the cavity, the emission of this transducer then being mainly lateral.
- the transducer is located half in the tube and half in the cavity, a seal being then ensured between the cavity and the tube, the part of the transducer located in the tube dividing the latter into a front part ensuring a front emission and a rear part ensuring a rear emission, these two parts being watertight towards one another.
- it comprises two transducers, a tr.ansducteur housed in a tube ensuring the two front and rear emissions, and a tr.ansducteur housed in a cavity ensuring the lateral emission.
- it comprises several tubes, each comprising a transducer.
- the cavity comprises other transducers whose principle axis is in a plane parallel to the open face of the cavity, the transmission of all these transducers being mainly lateral.
- This device can comprise several cavities each comprising one or more transducers.
- the tube has its main non-rectilinear axis.
- the open face of the cavity has a non-planar shape making it possible to release a front part of a transducer, this part then emitting a sound directly outside the cavity.
- each cavity may include a fan placed between the transducer and the closed side opposite the open face.
- Figure 1 shows a first embodiment of the invention comprising a single transducer, the tube and the cavity then being adjacent;
- FIG. 2 shows a second embodiment comprising two transducers, one housed in the tube and the other housed in a cavity, the tube and the cavity then being separated;
- Figure 3 is a view according to Figure 2;
- Figure 4 shows u: third embodiment comprising two tubes each provided with a transducer and a cavity containing three tr.ansductors;
- Figure 5 is a view along V of Figure 4;
- FIG. 6 shows an alternative embodiment, in which the tube is bent and the open face of the cavity is of non-planar shape;
- Figure 7 is a sectional view along VU of Figure 6;
- Figures 8 and 9 show a non-planar cavity containing three transducers;
- FIG. 10 shows a cavity provided with a fan drawing the air outside;
- Figure 11 shows the same cavity, the fan stirring air from the cavity without external input.
- the sound reproduction device consists of a tube 1, a cavity 2 adjacent to the tube and a transducer 3 composed mainly of a conical membrane 4 and a magnet 5.
- the transducer is housed substantially half in the tube 1 and half in the cavity 2.
- a seal is ensured by means of a seal 6 between the front part of the tube and the rear part of this tube, the front part corresponding to the emission zone E j , while the rear part corresponds to an emission zone E2.
- a seal is also ensured using a flexible wall 7 separating the emission zone E j and the emission zone E3 in quadrature. This flexible wall allows the movement of the transducer membrane.
- the emission zone E j corresponds to a frontal zone emitting the sound usually
- the emission zone E2 corresponds to a rear zone
- the zone E3 is called short-circuit zone where the front zone and the zone meet back.
- the length of the tube is, to within ⁇ 8%, equal to ten times or four times its internal diameter, and the transducer is substantially fixed to a quarter of the length of the tube, which corresponds to a maximum, the transducer being able to be fixed in an area between the edge of the tube, emission side E j , and a quarter of the length of the tube.
- the device comprises a separate tube 8 and a cavity 10, so that the tube comprises a loudspeaker 9 whose main axis coincides with that of the tube, the cavity 10 comprising a loudspeaker 11
- the main axis of this speaker 11 is in a plane parallel to the open face of the cavity 10, in other words the axis of the speaker 11 is perpendicular to the emission E3 itself in quadrature with the emission E j and E 2 of the tube 8.
- This loudspeaker 11 is maintained by three supports 12 integral with the cavity.
- Figure 2 shows a single support 12 mounted on the rear face of the cavity, opposite the open face, and Figure 3 shows the other two supports 12 each mounted on a side face.
- the device has two tubes 8.8a and a cavity
- the tube 8 has a speaker 9 and the tube 8a has a speaker 9a.
- the length of the tube 8a is substantially equal to ten times its internal diameter, while the tube 8 has a length substantially equal to four times its internal diameter.
- the length of the tube 8a is 170 cm and the diameter of the tube, corresponding to the diameter of the loudspeaker, is 17 cm, while the tube 8 has a length of 84 cm and the diameter of the tube , corresponding to the diameter of the speaker 9, is 21 cm.
- Each loudspeaker is of course mounted about a quarter of the length of the tube, the emission zone E2 then having a length substantially equal to three times the length of the emission zone E j .
- the cavity 13 contains three loudspeakers, a loudspeaker 14 reproducing the bass sounds, a loudspeaker 15 reproducing the medium sounds and a loudspeaker 16 reproducing the high sounds.
- each loudspeaker has its main axis situated in a plane parallel to the open face of the cavity, so that the emission E3 takes place mainly on the side of each loudspeaker.
- each speaker can be oriented differently in the cavity, so that the main axis of each speaker is no longer necessarily vertical.
- the apparatus comprises a tube 22 enclosing a loudspeaker 23 and a cavity 24 enclosing a loudspeaker 25.
- the tube 22 is, in this figure 6, bent, but it could of course take all possible forms, for example in a spiral.
- the only conditions to be respected are the length equal to approximately four times or ten times the internal diameter, and the position of the loudspeaker to approximately a quarter of the length of the tube, with an area Ei three times smaller than the area E2.
- the cavity 24 is, in this figure 6, of oval shape and it contains a loudspeaker 25 bearing on three supports 26, 27, 28, the supports 27 and 28 being visible in FIG. 7.
- the particularity of this cavity is the fact that the loudspeaker has a part of its front face visible from the outside of the cavity.
- the frontal emission E is then direct, outside the cavity, which does not deteriorate the quality of the sound reproduction, provided that the direct emission E thus created is not greater than 40% of the emissions E j + E2-
- the same effect could be obtained with an open face perpendicular to the lateral faces (as is the case in Figures 2 and 4), but with a transducer inclined by ⁇ 38 ° relative to a vertical axis, this being represented in FIG. 6. It suffices then to modify the position of the support 26.
- FIGS. 10 and 11 show a cavity 35 comprising a fan 38, which further improves the sound reproduction.
- This cavity 35 contains a loudspeaker 36 mounted on a base 37.
- the fan 38 draws air outside the cavity, through an orifice 39, while in the case of FIG. 11, the cavity 35 does not have an orifice 39 and the fan 38 then only mixes the air present in the cavity.
- an apparatus according to the invention can comprise for one channel or for each channel in the case of stereophony, one or more tubes of different lengths, straight or not, enclosing a loudspeaker, and one or more parallelepip ⁇ dic or curved cavities, and enclosing one or more loudspeakers.
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Pinball Game Machines (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/064,119 US5446793A (en) | 1990-10-16 | 1991-10-16 | Method of improving the quality of sound reproduction and apparatus for carrying at least one loudspeaker emitting in three directions |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR90/12757 | 1990-10-16 | ||
| FR9012757A FR2668015B1 (fr) | 1990-10-16 | 1990-10-16 | Procede pour ameliorer la qualite de la restitution d'une ambiance sonore, et appareil de mise en óoeuvre comportant au moins un haut-parleur emettant dans trois directions. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992007448A1 true WO1992007448A1 (fr) | 1992-04-30 |
Family
ID=9401266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1991/000803 Ceased WO1992007448A1 (fr) | 1990-10-16 | 1991-10-16 | Procede pour ameliorer la qualite de la restitution d'une ambiance sonore, et appareil de mise en ×uvre comportant au moins un haut-parleur emettant dans trois directions |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5446793A (fr) |
| EP (1) | EP0553239A1 (fr) |
| CA (1) | CA2094293A1 (fr) |
| FR (1) | FR2668015B1 (fr) |
| WO (1) | WO1992007448A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605224A1 (fr) * | 1992-12-25 | 1994-07-06 | Kabushiki Kaisha Toshiba | Système de haut-parleurs pour un appareil de télévision |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5792999A (en) * | 1997-01-23 | 1998-08-11 | Bose Corporation | Noise attenuating in ported enclosure |
| KR200197828Y1 (ko) * | 2000-02-22 | 2000-09-15 | 주식회사일성 인터내셔날 | 퍼스널 컴퓨터용 스피커 |
| US6837333B2 (en) | 2001-04-05 | 2005-01-04 | Community Light And Sound, Inc. | Loudspeaker system with forced air circulation and control circuit therefor |
| JP3874117B2 (ja) * | 2004-03-23 | 2007-01-31 | ソニー株式会社 | スピーカーユニットを搭載した電子機器 |
| TWI251852B (en) * | 2004-09-27 | 2006-03-21 | Quanta Storage Inc | Display device and control method for anion generator |
| KR100620378B1 (ko) * | 2004-12-02 | 2006-09-08 | 삼성전자주식회사 | 스피커장치 |
| US7748495B2 (en) * | 2005-04-20 | 2010-07-06 | Krueger Paul M | Tubular loudspeaker |
| GB0603545D0 (en) * | 2006-02-22 | 2006-04-05 | Fletcher Edward S | Apparatus and method for reproduction of stereo sound |
| US7881488B2 (en) * | 2006-11-01 | 2011-02-01 | Bose Corporation | In-plane speaker |
| US9432764B2 (en) * | 2013-11-12 | 2016-08-30 | William Eugene Wheeler | Dynamic acoustic waveguide |
| CN105744437B (zh) * | 2016-05-11 | 2019-12-03 | 四川汗瑞翔科技有限责任公司 | 水平全向强声器 |
| WO2019071487A1 (fr) * | 2017-10-11 | 2019-04-18 | 深圳传音通讯有限公司 | Cavité de haut-parleur basée sur un terminal intelligent et terminal intelligent |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1472933A (fr) * | 1965-04-22 | 1967-03-17 | Dispositif de haut-parleur | |
| US3590942A (en) * | 1969-12-15 | 1971-07-06 | Scott Inc H H | Omnidirectional loudspeaker system |
| US3722616A (en) * | 1970-12-14 | 1973-03-27 | Ltv Altec Inc | Directional loudspeaker system |
| US3739096A (en) * | 1970-01-31 | 1973-06-12 | Philips Corp | Loudspeaker system having a cardioid directional response pattern |
| US4756382A (en) * | 1987-03-02 | 1988-07-12 | Hudson Iii Joseph L | Loudspeaker having enhanced response at bass frequencies |
| US4819761A (en) * | 1988-01-11 | 1989-04-11 | Dick Roderick A | Tubular loudspeaker system |
| EP0319437A1 (fr) * | 1987-12-01 | 1989-06-07 | Pierre Piccaluga | Perfectionnement des enceintes acoustiques |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR796407A (fr) * | 1935-10-16 | 1936-04-07 | Perfectionnements aux haut-parleurs à membrane | |
| FR1473239A (fr) * | 1966-01-31 | 1967-05-29 | ||
| JPS5332701A (en) * | 1976-09-07 | 1978-03-28 | Matsushita Electric Ind Co Ltd | Stereophonic sound regenerating apparatus |
| DK156454C (da) * | 1985-01-03 | 1990-01-15 | Johan Peter Lyngdorf | Hoejttalerenhed med mere end en bas/mellemtone-hoejttaler |
| US4811403A (en) * | 1987-06-10 | 1989-03-07 | U.S. Sound, Inc. | Ultralight loudspeaker enclosures |
| JP2701279B2 (ja) * | 1987-12-28 | 1998-01-21 | ヤマハ株式会社 | 音響装置 |
| JPH0260399A (ja) * | 1988-08-26 | 1990-02-28 | Sony Corp | スピーカ装置 |
| US5058169A (en) * | 1989-11-01 | 1991-10-15 | Temmer Stephen F | Public address system |
| GB2250157A (en) * | 1990-11-15 | 1992-05-27 | Stuart Victor Showell | Loudspeaker enclosures |
| JP2597425B2 (ja) * | 1990-12-14 | 1997-04-09 | 株式会社ケンウッド | 無指向性スピーカシステム |
-
1990
- 1990-10-16 FR FR9012757A patent/FR2668015B1/fr not_active Expired - Fee Related
-
1991
- 1991-10-16 WO PCT/FR1991/000803 patent/WO1992007448A1/fr not_active Ceased
- 1991-10-16 EP EP91919559A patent/EP0553239A1/fr not_active Withdrawn
- 1991-10-16 US US08/064,119 patent/US5446793A/en not_active Expired - Fee Related
- 1991-10-16 CA CA002094293A patent/CA2094293A1/fr not_active Abandoned
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1472933A (fr) * | 1965-04-22 | 1967-03-17 | Dispositif de haut-parleur | |
| US3590942A (en) * | 1969-12-15 | 1971-07-06 | Scott Inc H H | Omnidirectional loudspeaker system |
| US3739096A (en) * | 1970-01-31 | 1973-06-12 | Philips Corp | Loudspeaker system having a cardioid directional response pattern |
| US3722616A (en) * | 1970-12-14 | 1973-03-27 | Ltv Altec Inc | Directional loudspeaker system |
| US4756382A (en) * | 1987-03-02 | 1988-07-12 | Hudson Iii Joseph L | Loudspeaker having enhanced response at bass frequencies |
| EP0319437A1 (fr) * | 1987-12-01 | 1989-06-07 | Pierre Piccaluga | Perfectionnement des enceintes acoustiques |
| US4819761A (en) * | 1988-01-11 | 1989-04-11 | Dick Roderick A | Tubular loudspeaker system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605224A1 (fr) * | 1992-12-25 | 1994-07-06 | Kabushiki Kaisha Toshiba | Système de haut-parleurs pour un appareil de télévision |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2668015B1 (fr) | 1993-07-30 |
| CA2094293A1 (fr) | 1992-04-17 |
| US5446793A (en) | 1995-08-29 |
| EP0553239A1 (fr) | 1993-08-04 |
| FR2668015A1 (fr) | 1992-04-17 |
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