GB360517A - An improved microphone for deaf people - Google Patents

An improved microphone for deaf people

Info

Publication number
GB360517A
GB360517A GB24599/30A GB2459930A GB360517A GB 360517 A GB360517 A GB 360517A GB 24599/30 A GB24599/30 A GB 24599/30A GB 2459930 A GB2459930 A GB 2459930A GB 360517 A GB360517 A GB 360517A
Authority
GB
United Kingdom
Prior art keywords
carbon
casing
diaphragm
electrodes
depressions
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
GB24599/30A
Other languages
English (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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Publication of GB360517A publication Critical patent/GB360517A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
GB24599/30A 1929-08-17 1930-08-16 An improved microphone for deaf people Expired GB360517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE360517X 1929-08-17

Publications (1)

Publication Number Publication Date
GB360517A true GB360517A (en) 1931-11-12

Family

ID=6294386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24599/30A Expired GB360517A (en) 1929-08-17 1930-08-16 An improved microphone for deaf people

Country Status (3)

Country Link
US (1) US1944720A (enrdf_load_stackoverflow)
DE (1) DE616935C (enrdf_load_stackoverflow)
GB (1) GB360517A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
US1944720A (en) 1934-01-23
DE616935C (enrdf_load_stackoverflow)

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