FR398151A - Device for improving the action of speech or sound in telephones - Google Patents

Device for improving the action of speech or sound in telephones

Info

Publication number
FR398151A
FR398151A FR398151DA FR398151A FR 398151 A FR398151 A FR 398151A FR 398151D A FR398151D A FR 398151DA FR 398151 A FR398151 A FR 398151A
Authority
FR
France
Prior art keywords
telephones
speech
sound
improving
action
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)
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.)
ENERGOFON AS
Original Assignee
ENERGOFON AS
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 ENERGOFON AS filed Critical ENERGOFON AS
Application granted granted Critical
Publication of FR398151A publication Critical patent/FR398151A/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
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR398151D 1908-01-25 1908-12-22 Device for improving the action of speech or sound in telephones Expired FR398151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO398151X 1908-01-25

Publications (1)

Publication Number Publication Date
FR398151A true FR398151A (en) 1909-05-28

Family

ID=1443184

Family Applications (1)

Application Number Title Priority Date Filing Date
FR398151D Expired FR398151A (en) 1908-01-25 1908-12-22 Device for improving the action of speech or sound in telephones

Country Status (1)

Country Link
FR (1) FR398151A (en)

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