WO1989007876A1 - Improved audio transducer with controlled flexibility diaphragm - Google Patents

Improved audio transducer with controlled flexibility diaphragm Download PDF

Info

Publication number
WO1989007876A1
WO1989007876A1 PCT/US1989/000505 US8900505W WO8907876A1 WO 1989007876 A1 WO1989007876 A1 WO 1989007876A1 US 8900505 W US8900505 W US 8900505W WO 8907876 A1 WO8907876 A1 WO 8907876A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
transducer
audio transducer
improved audio
controlled flexibility
Prior art date
Application number
PCT/US1989/000505
Other languages
French (fr)
Inventor
Paul W. Paddock
Steven R. Geist
Original Assignee
Linaeum Corporation
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 Linaeum Corporation filed Critical Linaeum Corporation
Priority to EP89902472A priority Critical patent/EP0400048B1/en
Priority to AU30583/89A priority patent/AU628039B2/en
Priority to DE68920031T priority patent/DE68920031T2/en
Publication of WO1989007876A1 publication Critical patent/WO1989007876A1/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

An improved audio transducer (10) includes a diaphragm (22) having a pair of cylindrically-shaped webs (24, 26) that provide greater bandwidth, reduced distortion and greater horizontal dispersion of sound. The audio output of the transducer (10) is further improved by forming the diaphragm (22) of a polyvinyl fluoride film. Other improvements include the use of damping pads (66, 68, 70, 71) to damp internal sound waves and damping strips (73) on the diaphragm (22) to minimize distortion at the resonant frequency of the transducer (10).
PCT/US1989/000505 1988-02-10 1989-02-08 Improved audio transducer with controlled flexibility diaphragm WO1989007876A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP89902472A EP0400048B1 (en) 1988-02-10 1989-02-08 Improved audio transducer with controlled flexibility diaphragm
AU30583/89A AU628039B2 (en) 1988-02-10 1989-02-08 Improved audio transducer with controlled flexibility diaphragm
DE68920031T DE68920031T2 (en) 1988-02-10 1989-02-08 AUDIOTRANSDUCER WITH ADJUSTABLE FLEXIBILITY DIAPHRAGMA.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US154,945 1988-02-10
US07/154,945 US4903308A (en) 1988-02-10 1988-02-10 Audio transducer with controlled flexibility diaphragm

Publications (1)

Publication Number Publication Date
WO1989007876A1 true WO1989007876A1 (en) 1989-08-24

Family

ID=22553482

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/000505 WO1989007876A1 (en) 1988-02-10 1989-02-08 Improved audio transducer with controlled flexibility diaphragm

Country Status (7)

Country Link
US (1) US4903308A (en)
EP (1) EP0400048B1 (en)
JP (1) JPH03503587A (en)
AT (1) ATE115823T1 (en)
CA (1) CA1322588C (en)
DE (1) DE68920031T2 (en)
WO (1) WO1989007876A1 (en)

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WO1989003160A1 (en) * 1987-10-02 1989-04-06 Lineaum Corporation Centering device for speaker diaphragm
JP2560932Y2 (en) * 1990-05-22 1998-01-26 株式会社 オーディオテクニカ Electrodynamic microphone diaphragm
US5230021A (en) * 1991-05-31 1993-07-20 Linaeum Corporation Audio transducer improvements
US5249237A (en) * 1991-05-31 1993-09-28 Linaeum Corporation Audio transducer improvements
US5450497A (en) * 1992-05-11 1995-09-12 Linaeum Corporation Audio transducer improvements
US5446797A (en) * 1992-07-17 1995-08-29 Linaeum Corporation Audio transducer with etched voice coil
AU4683493A (en) * 1992-07-17 1994-02-14 Linaeum Corporation Audio transducer with etched voice coil
AU5685894A (en) * 1992-12-08 1994-07-04 Linaeum Corporation Audio transducer with flexible foam enclosure
US5652801A (en) * 1994-05-02 1997-07-29 Aura Systems, Inc. Resonance damper for piezoelectric transducer
US5727076A (en) * 1994-05-02 1998-03-10 Aura Systems, Inc. Audio transducer having piezoelectric device
US5701358A (en) * 1994-07-05 1997-12-23 Larsen; John T. Isobaric loudspeaker
US5566242A (en) * 1994-08-02 1996-10-15 Velodyne Acoustics, Inc. Mechanism for a speaker assembly
JP3180646B2 (en) * 1995-12-14 2001-06-25 株式会社村田製作所 Speaker
US6278787B1 (en) * 1996-09-03 2001-08-21 New Transducers Limited Loudspeakers
US6606390B2 (en) * 1996-09-03 2003-08-12 New Transducer Limited Loudspeakers
US6061461A (en) * 1998-05-08 2000-05-09 Paddock; Paul W. Audio transducer
WO2001043489A2 (en) * 1999-12-09 2001-06-14 Sonionmicrotronic Nederland B.V. Miniature microphone
US7062058B2 (en) 2001-04-18 2006-06-13 Sonion Nederland B.V. Cylindrical microphone having an electret assembly in the end cover
US7136496B2 (en) * 2001-04-18 2006-11-14 Sonion Nederland B.V. Electret assembly for a microphone having a backplate with improved charge stability
US6937735B2 (en) * 2001-04-18 2005-08-30 SonionMicrotronic Néderland B.V. Microphone for a listening device having a reduced humidity coefficient
US7239714B2 (en) 2001-10-09 2007-07-03 Sonion Nederland B.V. Microphone having a flexible printed circuit board for mounting components
US8280082B2 (en) * 2002-10-08 2012-10-02 Sonion Nederland B.V. Electret assembly for a microphone having a backplate with improved charge stability
US7333620B2 (en) * 2003-04-09 2008-02-19 Harman International Industries, Incorporated Acoustic transducer with mechanical balancing
US7412065B2 (en) * 2003-04-09 2008-08-12 Harman International Industries, Incorporated Acoustic transducer with folded diaphragm
US7450729B2 (en) * 2003-04-09 2008-11-11 Harman International Industries, Incorporated Low-profile transducer
JP4524700B2 (en) * 2007-11-26 2010-08-18 ソニー株式会社 Speaker device and speaker driving method
US20100236861A1 (en) * 2009-03-17 2010-09-23 Merry Electronics Co., Ltd. Diaphragm of electro-acoustic transducer
EP2848008B1 (en) * 2012-05-09 2017-06-28 Christensen Audio, Llc Wide-range, wide-angle loudspeaker driver
JP6048469B2 (en) * 2013-10-22 2016-12-21 ヤマハ株式会社 Electroacoustic transducer
JP6435662B2 (en) * 2014-06-27 2018-12-12 ヤマハ株式会社 Electroacoustic transducer
CN204733374U (en) * 2015-06-23 2015-10-28 瑞声光电科技(常州)有限公司 Loud speaker

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US3747880A (en) * 1970-07-06 1973-07-24 R Bock Speaker support system
US3973150A (en) * 1974-02-18 1976-08-03 Pioneer Electronic Corporation Rectangular, oriented polymer, piezoelectric diaphragm
US3978353A (en) * 1974-05-10 1976-08-31 Pioneer Electronic Corporation Piezoelectric acoustic speaker system
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US4584439A (en) * 1983-12-01 1986-04-22 Floating Membranes, Inc. Audio transducer with controlled flexibility diaphragm

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1788385A (en) * 1929-04-08 1931-01-13 Duffy Charles Hugh Sound amplifier
US3747880A (en) * 1970-07-06 1973-07-24 R Bock Speaker support system
US3973150A (en) * 1974-02-18 1976-08-03 Pioneer Electronic Corporation Rectangular, oriented polymer, piezoelectric diaphragm
US3978353A (en) * 1974-05-10 1976-08-31 Pioneer Electronic Corporation Piezoelectric acoustic speaker system
US4029171A (en) * 1975-01-07 1977-06-14 Manger J W Membrane for electroacoustic converter systems
US4584439A (en) * 1983-12-01 1986-04-22 Floating Membranes, Inc. Audio transducer with controlled flexibility diaphragm

Also Published As

Publication number Publication date
EP0400048A4 (en) 1991-08-21
US4903308A (en) 1990-02-20
DE68920031T2 (en) 1995-04-27
ATE115823T1 (en) 1994-12-15
EP0400048A1 (en) 1990-12-05
DE68920031D1 (en) 1995-01-26
EP0400048B1 (en) 1994-12-14
JPH03503587A (en) 1991-08-08
CA1322588C (en) 1993-09-28

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