IE840162L - Electro-acoustic transducer - Google Patents

Electro-acoustic transducer

Info

Publication number
IE840162L
IE840162L IE16284A IE16284A IE840162L IE 840162 L IE840162 L IE 840162L IE 16284 A IE16284 A IE 16284A IE 16284 A IE16284 A IE 16284A IE 840162 L IE840162 L IE 840162L
Authority
IE
Ireland
Prior art keywords
tunnels
holes
diaphragm
electro
support member
Prior art date
Application number
IE16284A
Other versions
IE55102B1 (en
Original Assignee
Stc 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 Stc Plc filed Critical Stc Plc
Publication of IE840162L publication Critical patent/IE840162L/en
Publication of IE55102B1 publication Critical patent/IE55102B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

In electro-acoustic transducers, especially for use in a telephone subscriber's instrument, to reduce the low frequency response of the transducer without increasing distortion one or more holes or tunnels (11) are provided through the diaphragm support member (5), the holes or tunnels coupling the air behind the diaphragm with the air in front. Such holes or tunnels can also be formed by a groove or grooves in the support member, the diaphragm rim then acting in effect as a lid for the or each such groove. The holes or tunnels do not have to be parallel to the plane of the diaphragm, and the idea is applicable to types of transducers other than the moving coil type. <IMAGE> [GB2134745A]
IE16284A 1983-02-04 1984-01-25 Electro-acoustic transducer IE55102B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08303131A GB2134745B (en) 1983-02-04 1983-02-04 Electro acoustic tranducer

Publications (2)

Publication Number Publication Date
IE840162L true IE840162L (en) 1984-08-04
IE55102B1 IE55102B1 (en) 1990-05-23

Family

ID=10537478

Family Applications (1)

Application Number Title Priority Date Filing Date
IE16284A IE55102B1 (en) 1983-02-04 1984-01-25 Electro-acoustic transducer

Country Status (6)

Country Link
AU (1) AU569275B2 (en)
GB (1) GB2134745B (en)
HK (1) HK76187A (en)
IE (1) IE55102B1 (en)
NZ (1) NZ206899A (en)
SG (1) SG40087G (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700594A1 (en) * 1986-01-16 1987-07-23 Akg Akustische Kino Geraete PRESSURE GRADIENT RECEIVER
GB8727072D0 (en) * 1987-11-19 1987-12-23 British Telecomm Moisture barrier assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388069A (en) * 1929-05-15 1933-02-20 Electrical Res Prod Inc Improvements in electrodynamic devices for use in receiving or transmitting sound
GB409368A (en) * 1932-04-12 1934-04-30 Electrical Res Prod Inc Improvements in or relating to acoustic devices of the electrodynamic type
AT274916B (en) * 1966-02-14 1969-10-10 Elektroakusztikai Gyar Dynamic microphone
GB1350122A (en) * 1970-10-29 1974-04-18 Electronic Res Ass Sound reproducing equipment
NL7105001A (en) * 1971-04-14 1972-10-17
US3940575A (en) * 1975-03-03 1976-02-24 Cbs Inc. Directional microphone
NZ197139A (en) * 1980-05-23 1985-01-31 Int Standard Electric Corp Moving coil electrodynamic transducer construction
GB2114855B (en) * 1982-02-09 1985-10-23 Standard Telephones Cables Ltd Moving coil transducer

Also Published As

Publication number Publication date
IE55102B1 (en) 1990-05-23
GB8303131D0 (en) 1983-03-09
AU569275B2 (en) 1988-01-28
AU2394284A (en) 1984-08-09
GB2134745A (en) 1984-08-15
NZ206899A (en) 1987-10-30
SG40087G (en) 1987-07-24
HK76187A (en) 1987-10-23
GB2134745B (en) 1986-10-22

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