FR414355A - Cooling device for high current microphones - Google Patents

Cooling device for high current microphones

Info

Publication number
FR414355A
FR414355A FR414355A FR414355DA FR414355A FR 414355 A FR414355 A FR 414355A FR 414355 A FR414355 A FR 414355A FR 414355D A FR414355D A FR 414355DA FR 414355 A FR414355 A FR 414355A
Authority
FR
France
Prior art keywords
cooling device
high current
microphones
current microphones
cooling
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
FR414355A
Other languages
French (fr)
Inventor
Carl Emil Egner
Johan Gunnar Holmstroem
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR414355A publication Critical patent/FR414355A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR414355A 1909-04-03 1910-03-31 Cooling device for high current microphones Expired FR414355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE414355X 1909-04-03

Publications (1)

Publication Number Publication Date
FR414355A true FR414355A (en) 1910-09-01

Family

ID=1458062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR414355A Expired FR414355A (en) 1909-04-03 1910-03-31 Cooling device for high current microphones

Country Status (1)

Country Link
FR (1) FR414355A (en)

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