GB1121718A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

Publication number
GB1121718A
GB1121718A GB2760166A GB2760166A GB1121718A GB 1121718 A GB1121718 A GB 1121718A GB 2760166 A GB2760166 A GB 2760166A GB 2760166 A GB2760166 A GB 2760166A GB 1121718 A GB1121718 A GB 1121718A
Authority
GB
United Kingdom
Prior art keywords
casing
members
chamber
unit
transducer unit
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
GB2760166A
Inventor
Michael Lawrence Gayford
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 GB2760166A priority Critical patent/GB1121718A/en
Publication of GB1121718A publication Critical patent/GB1121718A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

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)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

1,121,718. Microphones. STANDARD TELEPHONES & CABLES Ltd. 21 June, 1966, No. 27601/66. Heading H4J. A microphone includes an electroacoustic transducer unit 1 suspended in a hollow casing 2 by two spaced resilient members 3 and 4 each attached to the inside of the casing 2 and to the transducer unit 1, the members 3 and 4 insulating the unit 1 from mechanical vibration and shock and providing acoustically isolating internal walls in the casing 2. The casing 2 is preferably of circular section and each member 3 and 4 is a flat annulus. Members 3 and 4 are of rubber or plastics. Bolts 5, 8 and 12, 13 secure the members 3 and 4. The transducer unit 1 is a moving coil unit comprising a magnet and a, diaphragm 16. A wind and breath shield comprises an inner fine gauze 17 and an outer coarse gauze 18. The members 3 and 4 define a phase-changing chamber 20. Apertures 21 are covered internally with acoustic resistance material 22. A bass equalizing tube 23 leads inwardly from a side aperture 24 in the casing 2. A bass chamber 25 is connected to the rear of the diaphragm 16 by a tube 28, which may contain acoustic resistance material. The rear end of chamber 25 is closed by a transformer 26 and a connecting plug 27.
GB2760166A 1966-06-21 1966-06-21 Improvements in or relating to microphones Expired GB1121718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2760166A GB1121718A (en) 1966-06-21 1966-06-21 Improvements in or relating to microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2760166A GB1121718A (en) 1966-06-21 1966-06-21 Improvements in or relating to microphones

Publications (1)

Publication Number Publication Date
GB1121718A true GB1121718A (en) 1968-07-31

Family

ID=10262287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2760166A Expired GB1121718A (en) 1966-06-21 1966-06-21 Improvements in or relating to microphones

Country Status (1)

Country Link
GB (1) GB1121718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766333A (en) * 1972-06-15 1973-10-16 Electro Voice Shock insensitive transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766333A (en) * 1972-06-15 1973-10-16 Electro Voice Shock insensitive transducer

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