AU745969B2 - Acoustic device according to bending wave principle - Google Patents

Acoustic device according to bending wave principle Download PDF

Info

Publication number
AU745969B2
AU745969B2 AU64813/99A AU6481399A AU745969B2 AU 745969 B2 AU745969 B2 AU 745969B2 AU 64813/99 A AU64813/99 A AU 64813/99A AU 6481399 A AU6481399 A AU 6481399A AU 745969 B2 AU745969 B2 AU 745969B2
Authority
AU
Australia
Prior art keywords
acoustic device
shell
modes
coupled
transducer
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
Application number
AU64813/99A
Other languages
English (en)
Other versions
AU6481399A (en
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 AU6481399A publication Critical patent/AU6481399A/en
Application granted granted Critical
Publication of AU745969B2 publication Critical patent/AU745969B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (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)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
AU64813/99A 1998-11-06 1999-11-05 Acoustic device according to bending wave principle Ceased AU745969B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9824256 1998-11-06
GBGB9824256.3A GB9824256D0 (en) 1998-11-06 1998-11-06 Acoustic devices etc.
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
AU6481399A AU6481399A (en) 2000-05-29
AU745969B2 true AU745969B2 (en) 2002-04-11

Family

ID=10841891

Family Applications (1)

Application Number Title Priority Date Filing Date
AU64813/99A Ceased AU745969B2 (en) 1998-11-06 1999-11-05 Acoustic device according to bending wave principle

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
BR0208686A (pt) * 2001-04-05 2004-03-30 New Transducers Ltd Alto-falante
US7245729B2 (en) 2001-04-05 2007-07-17 New Transducers Limited Loudspeaker
US6813362B2 (en) 2001-04-05 2004-11-02 New Transducers Limited Loudspeaker and method of making same
JP2006121360A (ja) * 2004-10-21 2006-05-11 Authentic Ltd パネル型スピーカ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1998031188A1 (fr) * 1997-01-09 1998-07-16 New Transducers Limited Haut-parleurs
WO1998042536A1 (fr) * 1997-03-22 1998-10-01 New Transducers Limited Vehicules de tourisme equipes de haut-parleurs munis d'elements radiants acoustiques en forme de panneau

Family Cites Families (3)

* 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
GB9705981D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Personal computers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1998031188A1 (fr) * 1997-01-09 1998-07-16 New Transducers Limited Haut-parleurs
WO1998042536A1 (fr) * 1997-03-22 1998-10-01 New Transducers Limited Vehicules de tourisme equipes de haut-parleurs munis d'elements radiants acoustiques en forme de panneau

Also Published As

Publication number Publication date
WO2000028781A1 (fr) 2000-05-18
CA2349861A1 (fr) 2000-05-18
IL142429A0 (en) 2002-03-10
GB9824256D0 (en) 1998-12-30
NZ510971A (en) 2002-03-01
ZA200102755B (en) 2001-10-08
AU6481399A (en) 2000-05-29
ATE237211T1 (de) 2003-04-15
JP2002530032A (ja) 2002-09-10
EP1125473A1 (fr) 2001-08-22
CN1325606A (zh) 2001-12-05
DE69906775T2 (de) 2004-01-29
DE69906775D1 (de) 2003-05-15
BR9915114A (pt) 2001-07-31
CN1135058C (zh) 2004-01-14
ES2197682T3 (es) 2004-01-01
EP1125473B1 (fr) 2003-04-09
HK1035988A1 (en) 2001-12-14
KR20010080941A (ko) 2001-08-25
TW462202B (en) 2001-11-01

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Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)