EP1125473B1 - Dispositif acoustique conforme au principe des ondes de flexion - Google Patents

Dispositif acoustique conforme au principe des ondes de flexion Download PDF

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Publication number
EP1125473B1
EP1125473B1 EP99952703A EP99952703A EP1125473B1 EP 1125473 B1 EP1125473 B1 EP 1125473B1 EP 99952703 A EP99952703 A EP 99952703A EP 99952703 A EP99952703 A EP 99952703A EP 1125473 B1 EP1125473 B1 EP 1125473B1
Authority
EP
European Patent Office
Prior art keywords
acoustic device
modes
shell
coupled
outer shell
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
EP99952703A
Other languages
German (de)
English (en)
Other versions
EP1125473A1 (fr
Inventor
Neil Harris
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.)
NVF Tech Ltd
Original Assignee
New Transducers Ltd
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 New Transducers Ltd filed Critical New Transducers Ltd
Publication of EP1125473A1 publication Critical patent/EP1125473A1/fr
Application granted granted Critical
Publication of EP1125473B1 publication Critical patent/EP1125473B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • 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 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band
    • 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
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
    • 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Golf Clubs (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Claims (17)

  1. Un dispositif acoustique, comprenant une coque extérieure (1) pratiquement continue, courbée de façon à enfermer au moins partiellement un volume d'air (2) et un transducteur (3) couplé à la coque (1), caractérisé en ce que la coque (1) supporte des modes d'ondes de flexion uniformément répartis, ces ondes de flexion étant couplées au volume d'air (2) pour procurer des modes résonnants couplés, pour coupler ainsi un signal électrique dans le transducteur (3) aux modes couplés et donc ensuite au son ambiant.
  2. Un dispositif acoustique selon la revendication 1, dans lequel les modes résonnants s'étendent sur toute la coque (1).
  3. Un dispositif acoustique selon l'une quelconque des revendications précédentes, dans lequel le transducteur (3) est un excitateur pour exciter des modes résonnants de façon que le dispositif acoustique fonctionne comme un haut-parleur.
  4. Un dispositif acoustique selon l'une quelconque des revendications précédentes, ayant un orifice (7, 9) dans la coque extérieure.
  5. Un dispositif acoustique selon la revendication 4, dans lequel l'orifice (9) comprend un conduit s'étendant à l'intérieur du volume (2) à partir de la coque extérieure (1).
  6. Un dispositif acoustique selon l'une quelconque des revendications précédentes, dans lequel la coque extérieure (1) comprend une multiplicité de faces (11, 13, 15, 17).
  7. Un dispositif acoustique selon la revendication 6, dans lequel chaque face (11, 13, 15, 17) a une fréquence de résonance naturelle, et les fréquences de résonance naturelle ont des valeurs différentes.
  8. Un dispositif acoustique selon la revendication 7, dans lequel les fréquences de résonance naturelle différentes sont sélectionnées de façon que les dix à vingt modes résonnants ayant les fréquences les plus basses se trouvent à des fréquences entrelacées.
  9. Un dispositif acoustique selon la revendication 6, dans lequel la coque extérieure (1) comprend une face avant (11) et la face avant (11) a un rapport de forme de 1,6 à 2,2.
  10. Un dispositif acoustique selon la revendication 6 ou la revendication 9, dans lequel la coque extérieure (1) comprend une face avant rectangulaire (11) et le transducteur (3) vient en contact avec la face avant (11) à un emplacement se trouvant à une distance comprise entre 14% et 42% à partir d'un bord le long du côté long, et à une distance comprise entre 22% et 34% à partir d'un bord le long du côté court.
  11. Un dispositif acoustique selon l'une quelconque des revendications 6, 9 ou 10, dans lequel la coque extérieure (1) comprend des faces avant (11) et arrière (17) opposées.
  12. Un dispositif acoustique selon la revendication 11, dans lequel un premier transducteur (3) est placé sur la face avant (11), et un second transducteur (5) est placé sur la face arrière (17).
  13. Un dispositif acoustique selon la revendication 12, dans lequel les premier et second transducteurs (3, 5) sont couplés mécaniquement.
  14. Un dispositif acoustique selon la revendication 11, dans lequel un seul transducteur (3) est couplé à la fois aux faces avant et arrière (11, 17).
  15. Un dispositif acoustique selon la revendication 6, dans lequel la coque extérieure (1) a une forme de pyramide carrée tronquée.
  16. Un dispositif acoustique selon la revendication 6, dans lequel la coque extérieure (1) a une forme tétraédrique.
  17. Un procédé d'excitation d'un dispositif acoustique dans lequel on fournit une coque extérieure (1) pratiquement continue qui est courbée de façon à enfermer au moins partiellement un volume d'air (2), et deux transducteurs (3, 5) couplés à la coque, caractéristique par le fait que la coque (1) supporte des ondes de flexion qui sont couplées vers le volume pour produire des modes résonnants couplés, et on excite les deux transducteurs (3, 5) en phase avec un signal électrique commun, de façon que les transducteurs (3, 5) excitent les modes couplés de la coque (1) et du volume (2) en une configuration monopôle, et de l'énergie sonore soit rayonnée dans l'air ambiant à partir des modes couplés.
EP99952703A 1998-11-06 1999-11-05 Dispositif acoustique conforme au principe des ondes de flexion Expired - Lifetime EP1125473B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9824256.3A GB9824256D0 (en) 1998-11-06 1998-11-06 Acoustic devices etc.
GB9824256 1998-11-06
PCT/GB1999/003656 WO2000028781A1 (fr) 1998-11-06 1999-11-05 Dispositif acoustique conforme au principe des ondes de flexion

Publications (2)

Publication Number Publication Date
EP1125473A1 EP1125473A1 (fr) 2001-08-22
EP1125473B1 true EP1125473B1 (fr) 2003-04-09

Family

ID=10841891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99952703A Expired - Lifetime EP1125473B1 (fr) 1998-11-06 1999-11-05 Dispositif acoustique conforme au principe des ondes de flexion

Country Status (17)

Country Link
EP (1) EP1125473B1 (fr)
JP (1) JP2002530032A (fr)
KR (1) KR20010080941A (fr)
CN (1) CN1135058C (fr)
AT (1) ATE237211T1 (fr)
AU (1) AU745969B2 (fr)
BR (1) BR9915114A (fr)
CA (1) CA2349861A1 (fr)
DE (1) DE69906775T2 (fr)
ES (1) ES2197682T3 (fr)
GB (1) GB9824256D0 (fr)
HK (1) HK1035988A1 (fr)
IL (1) IL142429A0 (fr)
NZ (1) NZ510971A (fr)
TW (1) TW462202B (fr)
WO (1) WO2000028781A1 (fr)
ZA (1) ZA200102755B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370939A (en) * 2001-01-04 2002-07-10 New Transducers Ltd A curved or cylindrical bending wave loudspeaker panel
US6813362B2 (en) 2001-04-05 2004-11-02 New Transducers Limited Loudspeaker and method of making same
US7245729B2 (en) 2001-04-05 2007-07-17 New Transducers Limited Loudspeaker
MXPA03009073A (es) * 2001-04-05 2004-02-17 New Transducers Ltd Altavoz.
JP2006121360A (ja) * 2004-10-21 2006-05-11 Authentic Ltd パネル型スピーカ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119431A (en) * 1987-12-28 1992-06-02 Hamby William H Efficiency loudspeaker
US4989254A (en) * 1989-06-30 1991-01-29 Amalaha Leonard D Electro-acoustic transducer and manufacturing process
UA51671C2 (uk) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Акустичний пристрій
GB9705981D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Personal computers
GB9705979D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Passenger vehicles
PL334440A1 (en) * 1997-01-09 2000-02-28 New Transducers Ltd Loudspeaker

Also Published As

Publication number Publication date
CN1325606A (zh) 2001-12-05
HK1035988A1 (en) 2001-12-14
WO2000028781A1 (fr) 2000-05-18
ZA200102755B (en) 2001-10-08
BR9915114A (pt) 2001-07-31
AU6481399A (en) 2000-05-29
JP2002530032A (ja) 2002-09-10
DE69906775D1 (de) 2003-05-15
EP1125473A1 (fr) 2001-08-22
CA2349861A1 (fr) 2000-05-18
IL142429A0 (en) 2002-03-10
GB9824256D0 (en) 1998-12-30
TW462202B (en) 2001-11-01
KR20010080941A (ko) 2001-08-25
CN1135058C (zh) 2004-01-14
ES2197682T3 (es) 2004-01-01
DE69906775T2 (de) 2004-01-29
NZ510971A (en) 2002-03-01
AU745969B2 (en) 2002-04-11
ATE237211T1 (de) 2003-04-15

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