ATE237211T1 - ACOUSTIC DEVICE BASED ON THE BENDING WAVE PRINCIPLE - Google Patents

ACOUSTIC DEVICE BASED ON THE BENDING WAVE PRINCIPLE

Info

Publication number
ATE237211T1
ATE237211T1 AT99952703T AT99952703T ATE237211T1 AT E237211 T1 ATE237211 T1 AT E237211T1 AT 99952703 T AT99952703 T AT 99952703T AT 99952703 T AT99952703 T AT 99952703T AT E237211 T1 ATE237211 T1 AT E237211T1
Authority
AT
Austria
Prior art keywords
acoustic device
device based
bending wave
wave principle
resonant modes
Prior art date
Application number
AT99952703T
Other languages
German (de)
Inventor
Neil Harris
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
Application granted granted Critical
Publication of ATE237211T1 publication Critical patent/ATE237211T1/en

Links

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
    • H04R1/02—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
    • 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
    • H04R1/20—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

Abstract

An acoustic device has an outer shell (1) supporting bending waves and enclosing a volume (2). The bending waves couple to the enclosed volume to provide coupled resonant modes. A transducer (3, 5) is coupled to the shell to excite the coupled resonant modes. The coupling of the enclosed volume can improve the distribution of resonant modes.
AT99952703T 1998-11-06 1999-11-05 ACOUSTIC DEVICE BASED ON THE BENDING WAVE PRINCIPLE ATE237211T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9824256.3A GB9824256D0 (en) 1998-11-06 1998-11-06 Acoustic devices etc.
PCT/GB1999/003656 WO2000028781A1 (en) 1998-11-06 1999-11-05 Acoustic device according to bending wave principle

Publications (1)

Publication Number Publication Date
ATE237211T1 true ATE237211T1 (en) 2003-04-15

Family

ID=10841891

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99952703T ATE237211T1 (en) 1998-11-06 1999-11-05 ACOUSTIC DEVICE BASED ON THE BENDING WAVE PRINCIPLE

Country Status (17)

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

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
US7245729B2 (en) 2001-04-05 2007-07-17 New Transducers Limited Loudspeaker
CN1500364A (en) * 2001-04-05 2004-05-26 新型转换器有限公司 Loudspeaker
US6813362B2 (en) 2001-04-05 2004-11-02 New Transducers Limited Loudspeaker and method of making same
JP2006121360A (en) * 2004-10-21 2006-05-11 Authentic Ltd Panel type speaker

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 (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
GB9705979D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Passenger vehicles
BR9807064A (en) * 1997-01-09 2000-05-02 New Transducers Ltd Loudspeakers

Also Published As

Publication number Publication date
JP2002530032A (en) 2002-09-10
CN1135058C (en) 2004-01-14
ES2197682T3 (en) 2004-01-01
DE69906775D1 (en) 2003-05-15
CN1325606A (en) 2001-12-05
EP1125473B1 (en) 2003-04-09
AU745969B2 (en) 2002-04-11
KR20010080941A (en) 2001-08-25
EP1125473A1 (en) 2001-08-22
BR9915114A (en) 2001-07-31
ZA200102755B (en) 2001-10-08
WO2000028781A1 (en) 2000-05-18
DE69906775T2 (en) 2004-01-29
IL142429A0 (en) 2002-03-10
AU6481399A (en) 2000-05-29
CA2349861A1 (en) 2000-05-18
TW462202B (en) 2001-11-01
NZ510971A (en) 2002-03-01
HK1035988A1 (en) 2001-12-14
GB9824256D0 (en) 1998-12-30

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Legal Events

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