GB1277912A - Electro-acoustic transducers - Google Patents

Electro-acoustic transducers

Info

Publication number
GB1277912A
GB1277912A GB21953/69A GB2195369A GB1277912A GB 1277912 A GB1277912 A GB 1277912A GB 21953/69 A GB21953/69 A GB 21953/69A GB 2195369 A GB2195369 A GB 2195369A GB 1277912 A GB1277912 A GB 1277912A
Authority
GB
United Kingdom
Prior art keywords
disc
piezo
electric
april
microphone
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
GB21953/69A
Inventor
William Donald Cragg
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB21953/69A priority Critical patent/GB1277912A/en
Priority to IL34068A priority patent/IL34068A/en
Priority to DE19702019520 priority patent/DE2019520A1/en
Priority to JP45034316A priority patent/JPS4823005B1/ja
Priority to FR7015631A priority patent/FR2040447B1/fr
Priority to ES379238A priority patent/ES379238A1/en
Publication of GB1277912A publication Critical patent/GB1277912A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

1277912 Piezo-electric microphones STANDARD TELEPHONES & CABLES Ltd 21 April 1970 [30 April 1969] 21953/69 Heading H4J A bone conduction piezo-electric microphone or receiver comprises a thin disc 1 of piezoelectric material, e.g. a mixture of lead and zirconium titanate, with gold nichrome or silver electrodes 2, 3. The disc is bonded to a metal disc 6 having an acoustic stiffness equal to that of the disc 1 or to a second piezo-electric disc. The discs are polarized by the application of a high voltage and are then bonded together with opposite polarity, Fig. 2 (not shown), or the same polarity, Fig. 3 (not shown). The transducer element may be encapsulated in a rubber sheath and is adapted to be retained by a harness in close proximity to the forehead or cheek. The effect of external noise may be reduced by thickening the coating on the rear of the unit, Fig. 4 (not shown). The transducer may also be used in an ear insert microphone, Figs. 6-8 (not shown) with the element either spring loaded against the side of the ear canal or enclosed in a resilient plastics housing having a driving pip.
GB21953/69A 1969-04-30 1969-04-30 Electro-acoustic transducers Expired GB1277912A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB21953/69A GB1277912A (en) 1969-04-30 1969-04-30 Electro-acoustic transducers
IL34068A IL34068A (en) 1969-04-30 1970-03-12 Piezoelectric transducer
DE19702019520 DE2019520A1 (en) 1969-04-30 1970-04-22 Bone conduction microphone
JP45034316A JPS4823005B1 (en) 1969-04-30 1970-04-23
FR7015631A FR2040447B1 (en) 1969-04-30 1970-04-29
ES379238A ES379238A1 (en) 1969-04-30 1970-04-30 Electro-acoustic transducers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21953/69A GB1277912A (en) 1969-04-30 1969-04-30 Electro-acoustic transducers

Publications (1)

Publication Number Publication Date
GB1277912A true GB1277912A (en) 1972-06-14

Family

ID=10171533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21953/69A Expired GB1277912A (en) 1969-04-30 1969-04-30 Electro-acoustic transducers

Country Status (6)

Country Link
JP (1) JPS4823005B1 (en)
DE (1) DE2019520A1 (en)
ES (1) ES379238A1 (en)
FR (1) FR2040447B1 (en)
GB (1) GB1277912A (en)
IL (1) IL34068A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542499A2 (en) 2003-12-12 2005-06-15 Nec Tokin Corporation Acoustic vibration generating element
WO2017182179A1 (en) * 2016-04-19 2017-10-26 Robert Bosch Gmbh Micromechanical component, and method for producing a micromechanical component
CN114449417A (en) * 2020-10-30 2022-05-06 华为技术有限公司 Speaker and electronic equipment

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902262A (en) * 1973-12-19 1975-09-02 Burroughs Corp Identification and/or credit card with flush mounted panels
JPS5246724Y2 (en) * 1974-06-20 1977-10-24
JPS5411605U (en) * 1977-06-27 1979-01-25
JPS5363131A (en) * 1977-07-04 1978-06-06 Toshiba Corp Identification card
JPS5821468U (en) * 1981-08-06 1983-02-09 凸版印刷株式会社 card
EP0500985A1 (en) * 1991-02-27 1992-09-02 Masao Konomi Bone conduction microphone mount

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452217A (en) *
US2045427A (en) * 1933-05-24 1936-06-23 Sonotone Corp Bone-conduction hearing-aid
US3423543A (en) * 1965-06-24 1969-01-21 Harry W Kompanek Loudspeaker with piezoelectric wafer driving elements

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542499A2 (en) 2003-12-12 2005-06-15 Nec Tokin Corporation Acoustic vibration generating element
EP1542499A3 (en) * 2003-12-12 2005-06-29 Nec Tokin Corporation Acoustic vibration generating element
CN1627864B (en) * 2003-12-12 2010-09-01 Nec东金株式会社 Acoustic vibration generating element
US8107646B2 (en) 2003-12-12 2012-01-31 Nec Tokin Corporation Acoustic vibration generating element
WO2017182179A1 (en) * 2016-04-19 2017-10-26 Robert Bosch Gmbh Micromechanical component, and method for producing a micromechanical component
CN114449417A (en) * 2020-10-30 2022-05-06 华为技术有限公司 Speaker and electronic equipment
CN114449417B (en) * 2020-10-30 2022-11-25 华为技术有限公司 Speaker and electronic equipment

Also Published As

Publication number Publication date
DE2019520A1 (en) 1970-11-12
IL34068A (en) 1973-06-29
FR2040447A1 (en) 1971-01-22
JPS4823005B1 (en) 1973-07-10
FR2040447B1 (en) 1974-05-03
IL34068A0 (en) 1970-05-21
ES379238A1 (en) 1972-09-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee