DE3855825D1 - Akustischer Apparat - Google Patents

Akustischer Apparat

Info

Publication number
DE3855825D1
DE3855825D1 DE3855825T DE3855825T DE3855825D1 DE 3855825 D1 DE3855825 D1 DE 3855825D1 DE 3855825 T DE3855825 T DE 3855825T DE 3855825 T DE3855825 T DE 3855825T DE 3855825 D1 DE3855825 D1 DE 3855825D1
Authority
DE
Germany
Prior art keywords
acoustic apparatus
acoustic
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.)
Revoked
Application number
DE3855825T
Other languages
English (en)
Other versions
DE3855825T2 (de
Inventor
Kenji Yokoyama
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.)
Yamaha Corp
Original Assignee
Yamaha Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18275376&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3855825(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Yamaha Corp filed Critical Yamaha Corp
Application granted granted Critical
Publication of DE3855825D1 publication Critical patent/DE3855825D1/de
Publication of DE3855825T2 publication Critical patent/DE3855825T2/de
Anticipated expiration legal-status Critical
Revoked 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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
DE3855825T 1987-12-28 1988-12-16 Akustischer Apparat Revoked DE3855825T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62334262A JP2605321B2 (ja) 1987-12-28 1987-12-28 音響装置

Publications (2)

Publication Number Publication Date
DE3855825D1 true DE3855825D1 (de) 1997-04-17
DE3855825T2 DE3855825T2 (de) 1997-10-16

Family

ID=18275376

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3855825T Revoked DE3855825T2 (de) 1987-12-28 1988-12-16 Akustischer Apparat

Country Status (4)

Country Link
US (1) US4987564A (de)
EP (1) EP0322686B1 (de)
JP (1) JP2605321B2 (de)
DE (1) DE3855825T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248846A (en) * 1988-06-21 1993-09-28 Yamaha Corporation Musical instrument incorporating a Helmholtz resonator
EP0352536B1 (de) * 1988-07-20 1996-10-02 Yamaha Corporation Musikinstrument mit einem elektroakustischen Wandler zur Erzeugung eines Musiktons
US5313525A (en) * 1992-04-02 1994-05-17 Yamaha Corporation Acoustic apparatus with secondary quarterwave resonator
US5548650A (en) * 1994-10-18 1996-08-20 Prince Corporation Speaker excursion control system
US5783898A (en) * 1996-02-26 1998-07-21 Mcdonnell Douglas Corporation Piezoelectric shunts for simultaneous vibration reduction and damping of multiple vibration modes
JPH1152958A (ja) * 1997-08-05 1999-02-26 Murata Mfg Co Ltd 圧電型電気音響変換器
JP3296311B2 (ja) 1998-12-25 2002-06-24 ヤマハ株式会社 音響装置
FI112909B (fi) * 2001-02-19 2004-01-30 Genelec Oy Refleksikaiutinrakenne ja menetelmä sen muodostamiseksi
FI122126B (fi) 2005-10-05 2011-08-31 Genelec Oy Refleksikaiutinrakenne
US8224009B2 (en) * 2007-03-02 2012-07-17 Bose Corporation Audio system with synthesized positive impedance
US9173018B2 (en) 2012-06-27 2015-10-27 Bose Corporation Acoustic filter
FR3018024B1 (fr) * 2014-02-26 2016-03-18 Devialet Dispositif de commande d'un haut-parleur
FR3018025B1 (fr) * 2014-02-26 2016-03-18 Devialet Dispositif de commande d'un haut-parleur
JP6299363B2 (ja) * 2014-04-16 2018-03-28 ヤマハ株式会社 駆動装置
WO2019164529A1 (en) * 2018-02-26 2019-08-29 Hewlett-Packard Development Company, L.P. Acoustic transducers with pole plates
JP2019161368A (ja) * 2018-03-09 2019-09-19 ヤマハ株式会社 駆動制御装置及び駆動制御方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL191081A (de) * 1953-10-02
US2887532A (en) * 1956-10-31 1959-05-19 Rca Corp Audio frequency amplifier
NL7017136A (de) * 1970-11-24 1972-05-26
US3917914A (en) * 1974-03-15 1975-11-04 Gen Electric Loudspeaker
SE398287B (sv) * 1976-03-24 1977-12-12 Stahl Karl Erik Forfarande for forbettring av ett elektrodynamiskt hogtalarelements basatergivning, samt anordning for utforande av forfarandet
US4196790A (en) * 1978-03-27 1980-04-08 Reams Robert W Acoustic transducer having multiple frequency resonance
US4287389A (en) * 1978-10-30 1981-09-01 Gamble George W High-fidelity speaker system
DE2854899A1 (de) * 1978-12-19 1980-07-10 Erich Roske Lautsprechergehaeuse mit abgleichbarer resonanzfrequenz und verfahren zum abgleich der frequenz
JPS5911237B2 (ja) * 1979-08-16 1984-03-14 株式会社精工舎 圧電スピ−カ
JPS56134807A (en) * 1980-03-24 1981-10-21 Toshiba Corp Acoustic reproducing device
NL8004351A (nl) * 1980-07-30 1982-03-01 Philips Nv Elektreetomzetter.
US4323736A (en) * 1980-08-11 1982-04-06 Strickland James C Step-up circuit for driving full-range-element electrostatic loudspeakers
JPS5990491A (ja) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd オ−デイオ装置
US4602245A (en) * 1983-04-29 1986-07-22 Ensco, Inc. General purpose modular acoustic signal generator
GB8402229D0 (en) * 1984-01-27 1984-02-29 Tannoy Ltd Moving coil loudspeaker
NL8401041A (nl) * 1984-04-03 1985-11-01 Philips Nv Elektro-akoestische inrichting.
NL8501719A (nl) * 1985-06-14 1987-01-02 Philips Nv Basreflex luidsprekersysteem.

Also Published As

Publication number Publication date
EP0322686A3 (de) 1991-04-10
US4987564A (en) 1991-01-22
JPH01302997A (ja) 1989-12-06
DE3855825T2 (de) 1997-10-16
EP0322686A2 (de) 1989-07-05
JP2605321B2 (ja) 1997-04-30
EP0322686B1 (de) 1997-03-12

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation