BR8802768A - OPTICAL MICROPHONE - Google Patents

OPTICAL MICROPHONE

Info

Publication number
BR8802768A
BR8802768A BR8802768A BR8802768A BR8802768A BR 8802768 A BR8802768 A BR 8802768A BR 8802768 A BR8802768 A BR 8802768A BR 8802768 A BR8802768 A BR 8802768A BR 8802768 A BR8802768 A BR 8802768A
Authority
BR
Brazil
Prior art keywords
optical microphone
microphone
optical
Prior art date
Application number
BR8802768A
Other languages
Portuguese (pt)
Inventor
Mauro Henrique De Paula
Original Assignee
Mauro Henrique De Paula
Aparecido Augusto De Carvalho
Rene De Oste
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 Mauro Henrique De Paula, Aparecido Augusto De Carvalho, Rene De Oste filed Critical Mauro Henrique De Paula
Priority to BR8802768A priority Critical patent/BR8802768A/en
Priority to PCT/BR1989/000007 priority patent/WO1989012375A1/en
Publication of BR8802768A publication Critical patent/BR8802768A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • 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
BR8802768A 1988-06-02 1988-06-02 OPTICAL MICROPHONE BR8802768A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR8802768A BR8802768A (en) 1988-06-02 1988-06-02 OPTICAL MICROPHONE
PCT/BR1989/000007 WO1989012375A1 (en) 1988-06-02 1989-04-14 Optical microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR8802768A BR8802768A (en) 1988-06-02 1988-06-02 OPTICAL MICROPHONE

Publications (1)

Publication Number Publication Date
BR8802768A true BR8802768A (en) 1990-01-16

Family

ID=4044896

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8802768A BR8802768A (en) 1988-06-02 1988-06-02 OPTICAL MICROPHONE

Country Status (2)

Country Link
BR (1) BR8802768A (en)
WO (1) WO1989012375A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH686589A5 (en) * 1994-07-14 1996-04-30 Aritron Instr Ag Photoacoustic gas detector with optical infrasound microphone.
IL142142A (en) * 2001-03-20 2005-08-31 Phone Or Ltd Phantom power optical microphone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028932A (en) * 1973-06-15 1977-06-14 Hoffman-La Roche Inc. Photo acoustic cell
US4200399A (en) * 1978-11-20 1980-04-29 General Motors Corporation Resonant optoacoustic spectroscopy apparatus
GB2161341A (en) * 1984-05-31 1986-01-08 Christopher Buckingham Laser microphone
US4926696A (en) * 1986-11-19 1990-05-22 Massachusetts Institute Of Technology Optical micropressure transducer

Also Published As

Publication number Publication date
WO1989012375A1 (en) 1989-12-14

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