JPS57123797A - Motional feedback type speaker - Google Patents

Motional feedback type speaker

Info

Publication number
JPS57123797A
JPS57123797A JP873681A JP873681A JPS57123797A JP S57123797 A JPS57123797 A JP S57123797A JP 873681 A JP873681 A JP 873681A JP 873681 A JP873681 A JP 873681A JP S57123797 A JPS57123797 A JP S57123797A
Authority
JP
Japan
Prior art keywords
light
detector
reflector plate
objective lens
displacement
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.)
Pending
Application number
JP873681A
Other languages
English (en)
Inventor
Masahiro Higuchi
Kenji Torasawa
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki Co 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP873681A priority Critical patent/JPS57123797A/ja
Publication of JPS57123797A publication Critical patent/JPS57123797A/ja
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
JP873681A 1981-01-22 1981-01-22 Motional feedback type speaker Pending JPS57123797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP873681A JPS57123797A (en) 1981-01-22 1981-01-22 Motional feedback type speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP873681A JPS57123797A (en) 1981-01-22 1981-01-22 Motional feedback type speaker

Publications (1)

Publication Number Publication Date
JPS57123797A true JPS57123797A (en) 1982-08-02

Family

ID=11701232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP873681A Pending JPS57123797A (en) 1981-01-22 1981-01-22 Motional feedback type speaker

Country Status (1)

Country Link
JP (1) JPS57123797A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108024708A (zh) * 2015-09-03 2018-05-11 佛拓诺公司 用于眼睛测量的方法和布置
US10034109B2 (en) 2015-04-09 2018-07-24 Audera Acoustics Inc. Acoustic transducer systems with position sensing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10034109B2 (en) 2015-04-09 2018-07-24 Audera Acoustics Inc. Acoustic transducer systems with position sensing
CN108024708A (zh) * 2015-09-03 2018-05-11 佛拓诺公司 用于眼睛测量的方法和布置
JP2018529419A (ja) * 2015-09-03 2018-10-11 フォトノ オサケユキチュア 目の測定のための方法及び装置
US10765558B2 (en) 2015-09-03 2020-09-08 Photono Oy Method and arrangement for eye measurements

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