FR865911A - Audiphone perfectionné - Google Patents

Audiphone perfectionné

Info

Publication number
FR865911A
FR865911A FR865911DA FR865911A FR 865911 A FR865911 A FR 865911A FR 865911D A FR865911D A FR 865911DA FR 865911 A FR865911 A FR 865911A
Authority
FR
France
Prior art keywords
audiphone
advanced
advanced audiphone
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)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR865911A publication Critical patent/FR865911A/fr
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
    • H04R25/00—Electric hearing aids
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
FR865911D 1939-06-20 1940-05-31 Audiphone perfectionné Expired FR865911A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US535753XA 1939-06-20 1939-06-20

Publications (1)

Publication Number Publication Date
FR865911A true FR865911A (fr) 1941-06-09

Family

ID=21985195

Family Applications (1)

Application Number Title Priority Date Filing Date
FR865911D Expired FR865911A (fr) 1939-06-20 1940-05-31 Audiphone perfectionné

Country Status (3)

Country Link
BE (1) BE469534A (fr)
FR (1) FR865911A (fr)
GB (1) GB535753A (fr)

Also Published As

Publication number Publication date
GB535753A (en) 1941-04-21
BE469534A (fr)

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