GB1297093A - - Google Patents

Info

Publication number
GB1297093A
GB1297093A GB1297093DA GB1297093A GB 1297093 A GB1297093 A GB 1297093A GB 1297093D A GB1297093D A GB 1297093DA GB 1297093 A GB1297093 A GB 1297093A
Authority
GB
United Kingdom
Prior art keywords
microphone
shell
disc
head
ear
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
Other languages
English (en)
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 filed Critical
Publication of GB1297093A publication Critical patent/GB1297093A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
GB1297093D 1971-04-23 1971-04-23 Expired GB1297093A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1101771 1971-04-23

Publications (1)

Publication Number Publication Date
GB1297093A true GB1297093A (ja) 1972-11-22

Family

ID=9978525

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297093D Expired GB1297093A (ja) 1971-04-23 1971-04-23

Country Status (2)

Country Link
FR (1) FR2134028A1 (ja)
GB (1) GB1297093A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7216501A (ja) * 1972-12-06 1974-06-10

Also Published As

Publication number Publication date
FR2134028A1 (ja) 1972-12-01

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees