FR572044A - Air thermo-microphone - Google Patents

Air thermo-microphone

Info

Publication number
FR572044A
FR572044A FR572044DA FR572044A FR 572044 A FR572044 A FR 572044A FR 572044D A FR572044D A FR 572044DA FR 572044 A FR572044 A FR 572044A
Authority
FR
France
Prior art keywords
microphone
air thermo
thermo
air
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
French (fr)
Inventor
Theodore Willard Case
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
Application granted granted Critical
Publication of FR572044A publication Critical patent/FR572044A/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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Glass Compositions (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Photoreceptors In Electrophotography (AREA)
FR572044D 1924-02-11 1923-10-18 Air thermo-microphone Expired FR572044A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB348524A GB233763A (en) 1924-02-11 1924-02-11 Improvements in microphones

Publications (1)

Publication Number Publication Date
FR572044A true FR572044A (en) 1924-05-28

Family

ID=9759203

Family Applications (1)

Application Number Title Priority Date Filing Date
FR572044D Expired FR572044A (en) 1924-02-11 1923-10-18 Air thermo-microphone

Country Status (2)

Country Link
FR (1) FR572044A (en)
GB (2) GB227173A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2346757B (en) * 1984-09-12 2001-02-21 Raytheon Co Transducer

Also Published As

Publication number Publication date
GB233763A (en) 1925-05-11
GB227173A (en) 1925-01-08

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