GB2011761B - Transducer of the electret type - Google Patents

Transducer of the electret type

Info

Publication number
GB2011761B
GB2011761B GB7849591A GB7849591A GB2011761B GB 2011761 B GB2011761 B GB 2011761B GB 7849591 A GB7849591 A GB 7849591A GB 7849591 A GB7849591 A GB 7849591A GB 2011761 B GB2011761 B GB 2011761B
Authority
GB
United Kingdom
Prior art keywords
transducer
electret type
electret
type
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
GB7849591A
Other versions
GB2011761A (en
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.)
Microtel BV
Original Assignee
Microtel BV
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
Priority claimed from US05/865,138 external-priority patent/US4160881A/en
Application filed by Microtel BV filed Critical Microtel BV
Publication of GB2011761A publication Critical patent/GB2011761A/en
Application granted granted Critical
Publication of GB2011761B publication Critical patent/GB2011761B/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
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
GB7849591A 1977-12-28 1978-12-21 Transducer of the electret type Expired GB2011761B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/865,138 US4160881A (en) 1977-12-28 1977-12-28 Electret transducers: acoustically transparent backplate of sintered conductive spheres and a thin electret coating; meshlike diaphragm spacing screen overlays apertured electret backplate with screen junctions overlaying the apertures
NL7809597A NL7809597A (en) 1977-12-28 1978-09-20 TRANSDUCER OF THE KIND SPECIFIED AS ELECTRIC.

Publications (2)

Publication Number Publication Date
GB2011761A GB2011761A (en) 1979-07-11
GB2011761B true GB2011761B (en) 1982-09-15

Family

ID=26645451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7849591A Expired GB2011761B (en) 1977-12-28 1978-12-21 Transducer of the electret type

Country Status (1)

Country Link
GB (1) GB2011761B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8900613A (en) * 1989-03-14 1990-10-01 Microtel Bv ACOUSTIC TRANSDUCER.

Also Published As

Publication number Publication date
GB2011761A (en) 1979-07-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee