GB2185168B - Improvements relating to microphones - Google Patents

Improvements relating to microphones

Info

Publication number
GB2185168B
GB2185168B GB8514202A GB8514202A GB2185168B GB 2185168 B GB2185168 B GB 2185168B GB 8514202 A GB8514202 A GB 8514202A GB 8514202 A GB8514202 A GB 8514202A GB 2185168 B GB2185168 B GB 2185168B
Authority
GB
United Kingdom
Prior art keywords
microphones
improvements relating
relating
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.)
Expired
Application number
GB8514202A
Other versions
GB2185168A (en
Inventor
Andrew Gordon Munns
Roger William Whatmore
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB8514202A priority Critical patent/GB2185168B/en
Publication of GB2185168A publication Critical patent/GB2185168A/en
Application granted granted Critical
Publication of GB2185168B publication Critical patent/GB2185168B/en
Expired 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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/02—Microphones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
GB8514202A 1985-06-05 1985-06-05 Improvements relating to microphones Expired GB2185168B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8514202A GB2185168B (en) 1985-06-05 1985-06-05 Improvements relating to microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8514202A GB2185168B (en) 1985-06-05 1985-06-05 Improvements relating to microphones

Publications (2)

Publication Number Publication Date
GB2185168A GB2185168A (en) 1987-07-08
GB2185168B true GB2185168B (en) 1989-07-05

Family

ID=10580214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8514202A Expired GB2185168B (en) 1985-06-05 1985-06-05 Improvements relating to microphones

Country Status (1)

Country Link
GB (1) GB2185168B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB646122A (en) * 1944-02-10 1950-11-15 Submarine Signal Co Improvements in or relating to subaqueous sound transmitting and receiving devices
EP0142318A2 (en) * 1983-11-09 1985-05-22 Matsushita Electric Industrial Co., Ltd. Ultrasonic probe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB646122A (en) * 1944-02-10 1950-11-15 Submarine Signal Co Improvements in or relating to subaqueous sound transmitting and receiving devices
EP0142318A2 (en) * 1983-11-09 1985-05-22 Matsushita Electric Industrial Co., Ltd. Ultrasonic probe

Also Published As

Publication number Publication date
GB2185168A (en) 1987-07-08

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940605