EP1368987B1 - Enceinte acoustique et appareil audiovisuel comportant une telle enceinte - Google Patents

Enceinte acoustique et appareil audiovisuel comportant une telle enceinte Download PDF

Info

Publication number
EP1368987B1
EP1368987B1 EP02700340A EP02700340A EP1368987B1 EP 1368987 B1 EP1368987 B1 EP 1368987B1 EP 02700340 A EP02700340 A EP 02700340A EP 02700340 A EP02700340 A EP 02700340A EP 1368987 B1 EP1368987 B1 EP 1368987B1
Authority
EP
European Patent Office
Prior art keywords
vent
bass
reflex
enclosure
box
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 - Lifetime
Application number
EP02700340A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1368987A1 (fr
Inventor
Gilles Bourgoin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THOMSON LICENSING
Original Assignee
Thomson Licensing SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of EP1368987A1 publication Critical patent/EP1368987A1/fr
Application granted granted Critical
Publication of EP1368987B1 publication Critical patent/EP1368987B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers

Definitions

  • the present invention relates to loudspeakers and audiovisual apparatus comprising such an enclosure.
  • a vent acoustic speaker comprising at least one electro-acoustic transducer, such as a speaker, mounted in a box.
  • a speaker is generally called bass-reflex enclosure or ventilated enclosure.
  • the assembly constituted by the volume of the box and the vent reacts to the vibratory excitations of the loudspeaker as an oscillating system (Helmholtz resonator), with a resonant frequency F 0 called resonance frequency of the bass-reflex.
  • Helmholtz resonator oscillating system
  • F 0 resonant frequency of the bass-reflex
  • bass-reflex speaker is particularly known in audiovisual devices, such as televisions, as described for example in the utility model JP 63-183 788.
  • Patent Applications US-5,659,155, FR-A-2,403,706 and DE-A-2 727,975 also disclose loudspeakers with vents according to the preamble of claim 1. These speakers however do not include attenuation means at the resonant frequency Fo.
  • the vent includes attenuation means at the resonance frequency of the bass reflex.
  • the invention also proposes an audiovisual apparatus which comprises a display device and such a speaker.
  • the speaker 2 shown in Figure 2 has four speakers 4 mounted on the front face 6 of a parallelepipedic box 8 of which the walls are made of wood.
  • the speakers 4 are aligned on the face before 6 of the box 8 in a general direction Y.
  • the box has an upper face 10 and a lower face 12 parallel to each other and each perpendicular to the Y direction.
  • the box also includes a rear face 7 parallel to the front face and two lateral faces 14.
  • the speakers are of type Odyssey 1 with suspension in foam.
  • the dimensions of the box 8 in the example studied are the following: height 250 mm (between upper face 10 and lower face 12); width 43 mm (between lateral faces 14); depth 55 mm (between face front 6 and back 7).
  • the chamber 2 also comprises a vent 16 consisting of a rectangular opening 18 in the front face 6 as well as a plate upper 20 and a lower plate 22 parallel to the upper faces 10 and lower 12.
  • the opening 18 is not necessarily rectangular; it could alternatively be oblong.
  • the lower plates 22 and 20 do not extend over the entire depth of the well 8 (that is, their area is less than that of the lower faces 12 and 10). In the example, she extend over 40 mm. Of course, alternatively, the plates may have different lengths from each other. They are not necessarily rectangular or perfectly flat.
  • the lower plates 22 and 20 are spaced 5 mm and thus define between them a volume of vent which opens on the one hand on the outside of the box 8 through the opening 18 and secondly on the inside of the box.
  • the lower plates 22 and 20 extend over the entire width of the front face so that the vent volume is also delimited by the lateral faces 14.
  • Such an assembly constitutes a bass-reflex chamber 2 having a resonance frequency F 0 of 155 Hz.
  • the lower plates 22 and upper 20 each have a inferior rigidity to the walls of the box 8.
  • the plates 20, 22 are made of PS - HI (high impact polystyrene) with a thickness of 0.17 mm.
  • These plates 20, 22 behave like vibrating flexible plates and are designed so that their mechanical resonance frequency F M is close to the resonance frequency F 0 of the bass-reflex enclosure 2.
  • the plates 20, 22 have a mechanical resonance frequency F M of 153 Hz.
  • the plates 20, 22 attenuate and limit the influence of the vent around the resonance frequency of the bass -reflex F 0 , without changing its value, absorbing in part the vibrations whose frequency is close to the mechanical resonance frequency F M.
  • the bass-reflex loudspeaker 2 therefore has an acoustic response (bold continuous line) improved in low frequency compared to a box without a vent (dotted line), without, however, presenting the resonance peak that is too sharp.
  • a classic bass - reflex speaker tilt continuous line
  • only one of the plates can be made with a lower rigidity to the walls of the box 8, the other plate being for example made identically to the walls of the box.
  • the dimensioning of the lower stiffness plate will then be designed so that the vent constitutes a mechanical system having a mechanical resonance frequency F M close to the resonance frequency of the bass reflex F 0 and thus provides a means of attenuation around the resonance frequency of the bass-reflex, and thus in particular the resonance frequency of the bass-reflex.
  • the mechanical resonance frequency is very close to (substantially equal to) the resonance frequency of the bass reflex. It is important to note, however, that the invention is not limited to this specific case but consists in providing attenuation means which cover in particular the resonance frequency of the bass reflex.
  • the cut-off frequency at -3 dB can be considered close to the resonance frequency.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP02700340A 2001-01-24 2002-01-21 Enceinte acoustique et appareil audiovisuel comportant une telle enceinte Expired - Lifetime EP1368987B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0100906A FR2819974A1 (fr) 2001-01-24 2001-01-24 Enceinte acoustique et appareil audiovisuel comportant une telle enceinte
FR0100906 2001-01-24
PCT/FR2002/000223 WO2002060217A1 (fr) 2001-01-24 2002-01-21 Enceinte acoustique et appareil audiovisuel comportant une telle enceinte

Publications (2)

Publication Number Publication Date
EP1368987A1 EP1368987A1 (fr) 2003-12-10
EP1368987B1 true EP1368987B1 (fr) 2005-12-14

Family

ID=8859156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02700340A Expired - Lifetime EP1368987B1 (fr) 2001-01-24 2002-01-21 Enceinte acoustique et appareil audiovisuel comportant une telle enceinte

Country Status (8)

Country Link
US (1) US7111706B2 (zh)
EP (1) EP1368987B1 (zh)
JP (1) JP3965120B2 (zh)
CN (1) CN100518383C (zh)
DE (1) DE60208000T2 (zh)
ES (1) ES2254640T3 (zh)
FR (1) FR2819974A1 (zh)
WO (1) WO2002060217A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013223950B4 (de) * 2013-11-22 2018-11-15 Henning Bosselmann Lautsprechergehäuse
CN111726710A (zh) * 2020-06-08 2020-09-29 无锡路通视信网络股份有限公司 一种便于拆卸安装的智能音柱
FR3113475B1 (fr) * 2020-08-18 2022-11-04 Renault Sas Caisson de basse

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834423A (en) * 1954-09-01 1958-05-13 Robert L Bradford High fidelity loud speaker enclosure
US3233695A (en) * 1964-07-10 1966-02-08 Budsen Corp Speaker enclosure
US3319737A (en) * 1966-06-17 1967-05-16 Barthel Lucien Acoustical enclosures
JPS4936416B1 (zh) * 1970-02-27 1974-09-30
DE2727075A1 (de) * 1977-06-13 1978-12-21 Sinum Klangstrahler Gmbh Doppelphasenkorrektor
NL184037C (nl) * 1977-09-15 1989-03-16 Novanex Automation Nv Luidsprekerstelsel.
US4756382A (en) * 1987-03-02 1988-07-12 Hudson Iii Joseph L Loudspeaker having enhanced response at bass frequencies
FR2623337B1 (zh) * 1987-11-18 1990-06-08 Dehaeze Jean Marie
EP0361445A3 (en) * 1988-09-28 1991-05-22 Yamaha Corporation Acoustic apparatus
US5432860A (en) * 1990-02-09 1995-07-11 Mitsubishi Denki Kabushiki Kaisha Speaker system
DE69110530T2 (de) * 1990-04-20 1996-02-29 Matsushita Electric Ind Co Ltd Lautsprechersystem.
US5170436A (en) * 1991-01-24 1992-12-08 Allan L. Powell Acoustic speaker system
US5150417A (en) * 1991-02-25 1992-09-22 Socon Ab Bass reflex type speaker system
JPH0549081A (ja) * 1991-08-09 1993-02-26 Pioneer Electron Corp スピーカシステム
US5659155A (en) * 1991-12-02 1997-08-19 Porzilli; Louis B. Acoustical transducer enclosure
US5327985A (en) * 1991-12-02 1994-07-12 Louis Porzilli Acoustical transducer enclosure
US5204501A (en) * 1992-02-20 1993-04-20 Tsao Ye Ming Synchronous common polar resonant wall type speaker cabinet
US5475764A (en) * 1992-09-30 1995-12-12 Polk Investment Corporation Bandpass woofer and method
US5809154A (en) * 1994-01-04 1998-09-15 Britannia Investment Corporation Ported loudspeaker system and method
US5602367A (en) * 1994-12-19 1997-02-11 Meyer Sound Laboratories Incorporated Multiple tuned high power bass reflex speaker system
FR2791802A1 (fr) * 1999-03-30 2000-10-06 Thomson Multimedia Sa Filtre mecanique pour systemes acoustiques et televiseur equipe de tels filtres
JP3778793B2 (ja) * 2000-01-28 2006-05-24 富士通テン株式会社 スピーカシステム

Also Published As

Publication number Publication date
ES2254640T3 (es) 2006-06-16
US7111706B2 (en) 2006-09-26
WO2002060217A1 (fr) 2002-08-01
JP3965120B2 (ja) 2007-08-29
CN1488231A (zh) 2004-04-07
FR2819974A1 (fr) 2002-07-26
DE60208000D1 (de) 2006-01-19
US20040055812A1 (en) 2004-03-25
EP1368987A1 (fr) 2003-12-10
DE60208000T2 (de) 2006-06-22
CN100518383C (zh) 2009-07-22
JP2004538672A (ja) 2004-12-24

Similar Documents

Publication Publication Date Title
KR101262254B1 (ko) 확성기
EP0342117B1 (fr) Installation sonore, en particulier stéréophonique pour téléviseurs à haut-parleur intégré de fréquences basses de grandes dimensions
FR2919454A1 (fr) Systeme de reproduction sonore a enceinte a events.
EP3039672A1 (fr) Panneau acoustique
WO2017134125A1 (fr) Resonateur acoustique de faible epaisseur de type mille-feuille perfore pour l'absorption ou le rayonnement acoustique tres basses frequences
EP0362097A1 (fr) Enceinte électro-acoustique omnidirectionnelle
EP1368987B1 (fr) Enceinte acoustique et appareil audiovisuel comportant une telle enceinte
WO2004053246A1 (fr) Panneau acoustique a double paroi.
WO1980001128A1 (fr) Transducteur electro-acoustique
FR2791802A1 (fr) Filtre mecanique pour systemes acoustiques et televiseur equipe de tels filtres
CA2145629C (fr) Transducteur electro-acoustique a volume diffusant
WO2010112747A1 (fr) Panneau acoustique destine a recevoir, emettre ou absorber des sons
EP2700247B1 (fr) Dispositif d'emission d'une onde acoustique
CA2306678A1 (fr) Hydrophone pour la reception des ondes acoustiques ou sismiques
FR2652978A1 (fr) Enceinte acoustique.
EP0897176B1 (fr) Absorbeur acoustique sous-marin
FR2826827A1 (fr) Systeme acoustique hybride
EP0390626A1 (fr) Ensemble perfectionné de reproduction de sons
FR2618284A1 (fr) Enceinte acoustique a haute definition musicale.
EP3892010A1 (fr) Piece de rigidification pour caisson d'enceinte acoustique
FR2549333A1 (fr) Simulateur passif de charge infinie
FR2480056A1 (fr) Dispositif de decompression circulaire pour enceinte acoustique
FR2628281A1 (fr) Haut-parleur et plaque de modulation d'onde acoustique avec configuration en accordeon
FR2727819A1 (fr) Dispositif a event pour emetteur de son
FR2673347A1 (fr) Transducteur electroacoustique a decouplage acoustique optimise.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030728

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17Q First examination report despatched

Effective date: 20040427

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THOMSON LICENSING

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20051214

REF Corresponds to:

Ref document number: 60208000

Country of ref document: DE

Date of ref document: 20060119

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2254640

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060915

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60208000

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 60208000

Country of ref document: DE

Representative=s name: DEHNS PATENT AND TRADEMARK ATTORNEYS, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 60208000

Country of ref document: DE

Representative=s name: HOFSTETTER, SCHURACK & PARTNER PATENT- UND REC, DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: THOMSON LICENSING DTV, FR

Effective date: 20180830

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20180927 AND 20181005

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60208000

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 60208000

Country of ref document: DE

Owner name: INTERDIGITAL MADISON PATENT HOLDINGS, FR

Free format text: FORMER OWNER: THOMSON LICENSING, BOULOGNE BILLANCOURT, FR

Ref country code: DE

Ref legal event code: R082

Ref document number: 60208000

Country of ref document: DE

Representative=s name: DEHNS PATENT AND TRADEMARK ATTORNEYS, DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: INTERDIGITAL MADISON PATENT HOLDINGS

Effective date: 20190308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20200219

Year of fee payment: 19

Ref country code: IT

Payment date: 20200123

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20210127

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20210129

Year of fee payment: 20

Ref country code: GB

Payment date: 20210128

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60208000

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20220120

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20220427

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210121

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20220120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210122