JPS57133799A - Electroacoustic transducer - Google Patents

Electroacoustic transducer

Info

Publication number
JPS57133799A
JPS57133799A JP1798981A JP1798981A JPS57133799A JP S57133799 A JPS57133799 A JP S57133799A JP 1798981 A JP1798981 A JP 1798981A JP 1798981 A JP1798981 A JP 1798981A JP S57133799 A JPS57133799 A JP S57133799A
Authority
JP
Japan
Prior art keywords
diaphragm plate
reflecting
constitution
supported
binary code
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
JP1798981A
Other languages
Japanese (ja)
Inventor
Hideshi Kenjo
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP1798981A priority Critical patent/JPS57133799A/en
Publication of JPS57133799A publication Critical patent/JPS57133799A/en
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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To simplify the constitution, by photoelectric-transducing the vibration of a diaphragm plate through the use of an optical means and obtaining a digital output directly. CONSTITUTION:A diaphragm plate 14 is supported with a circular ridge in a microphone vessel 15 and a light source 16 such as light emitting diode is supported to a base plate 17. At almost the center of inner surface of the diaphragm plate, an optical element 19 consisting of binary code pattern formed with reflecting and non-reflecting planes is engraved and the element is responsed together with the diaphragm plate 14. The light flux illuminated at the light source 16 and formed in stripes with a cylindrical lens 19 is reflected on the element 19 having the reflecting plane in the binary code pattern and incident to a photoelectric transducer 20. The transducer 20 has photo detecting planes 21-24 lengthwise by the number of columns corresponding to the bit of pattern of the optical element 19.
JP1798981A 1981-02-12 1981-02-12 Electroacoustic transducer Pending JPS57133799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1798981A JPS57133799A (en) 1981-02-12 1981-02-12 Electroacoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1798981A JPS57133799A (en) 1981-02-12 1981-02-12 Electroacoustic transducer

Publications (1)

Publication Number Publication Date
JPS57133799A true JPS57133799A (en) 1982-08-18

Family

ID=11959125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1798981A Pending JPS57133799A (en) 1981-02-12 1981-02-12 Electroacoustic transducer

Country Status (1)

Country Link
JP (1) JPS57133799A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60123197A (en) * 1983-12-06 1985-07-01 Nagano Nippon Musen Kk Acoustic signal/electric signal converter
JP2001268696A (en) * 2000-03-17 2001-09-28 Nippon Hoso Kyokai <Nhk> Optical microphone
JP2010266392A (en) * 2009-05-18 2010-11-25 Kochi Univ Of Technology Apparatus for measurement of infrastructure sound

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60123197A (en) * 1983-12-06 1985-07-01 Nagano Nippon Musen Kk Acoustic signal/electric signal converter
JP2001268696A (en) * 2000-03-17 2001-09-28 Nippon Hoso Kyokai <Nhk> Optical microphone
JP2010266392A (en) * 2009-05-18 2010-11-25 Kochi Univ Of Technology Apparatus for measurement of infrastructure sound

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