BR8802768A - OPTICAL MICROPHONE - Google Patents

OPTICAL MICROPHONE

Info

Publication number: BR8802768A
Authority: BR; Brazil
Prior art keywords: optical microphone; microphone; optical
Prior art date: 1988-06-02

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.)

1988-06-02

Filing date

1988-06-02

Publication date

1990-01-16

1988-06-02 Application filed by Mauro Henrique De Paula, Aparecido Augusto De Carvalho, Rene De Oste filed Critical Mauro Henrique De Paula

1988-06-02 Priority to BR8802768A priority Critical patent/BR8802768A/en

1989-04-14 Priority to PCT/BR1989/000007 priority patent/WO1989012375A1/en

1990-01-16 Publication of BR8802768A publication Critical patent/BR8802768A/en

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

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Health & Medical Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Chemical & Material Sciences (AREA)
Analytical Chemistry (AREA)
Biochemistry (AREA)
General Health & Medical Sciences (AREA)
General Physics & Mathematics (AREA)
Immunology (AREA)
Pathology (AREA)
Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Investigating Or Analysing Materials By Optical Means (AREA)

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 (3)

* 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.
RU2169911C2 (en) *	1998-03-04	2001-06-27	Открытое акционерное общество "ЛОМО"	Optico-acoustic receiver
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

1988
- 1988-06-02 BR BR8802768A patent/BR8802768A/en unknown
1989
- 1989-04-14 WO PCT/BR1989/000007 patent/WO1989012375A1/en not_active Ceased

Also Published As

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

Publication	Publication Date	Title
DE69133296T2 (en)	2004-01-29	speech
DK41788D0 (en)	1988-01-28	MICROPHONE
FI893637A7 (en)	1990-02-03	Eyeglasses
DE68925691D1 (en)	1996-03-28	Telephone
FI891846A0 (en)	1989-04-18	OPTICAL AVBRY.
FI912295A0 (en)	1991-05-10	OPTICAL HASTIGHTSBESTAEMNING.
FI893190A7 (en)	1989-09-19	Fiber improvements
DE69026815D1 (en)	1996-06-05	OPTICAL AMPLIFIER
DE69133085D1 (en)	2002-09-12	speech
DE59107315D1 (en)	1996-03-07	SINGLE FASHION LASER
FI97260C (en)	1996-11-11	Optical fiber
KR900009800A (en)	1990-07-05	Optical film
IT8867721A0 (en)	1988-07-29	EYEGLASSES
DK126689A (en)	1989-09-23	Hearing aid
FI891907A7 (en)	1989-10-23	Lens
BR8802768A (en)	1990-01-16	OPTICAL MICROPHONE
KR900011168U (en)	1990-06-04	speaker
KR900004134U (en)	1990-02-08	Loudspeaker
BR6802337U (en)	1989-08-22	OPTICAL SET
DE68928682D1 (en)	1998-07-02	Optical scanner
KR900001214U (en)	1990-01-18	glasses
KR900004428U (en)	1990-03-06	Drawing case
KR910003696U (en)	1991-02-27	microphone
KR900009389U (en)	1990-05-04	speaker
KR900009385U (en)	1990-05-04	speaker