FR418195A - Improvements in devices intended to assist hearing - Google Patents

Improvements in devices intended to assist hearing

Info

Publication number
FR418195A
FR418195A FR418195A FR418195DA FR418195A FR 418195 A FR418195 A FR 418195A FR 418195 A FR418195 A FR 418195A FR 418195D A FR418195D A FR 418195DA FR 418195 A FR418195 A FR 418195A
Authority
FR
France
Prior art keywords
devices intended
assist hearing
hearing
assist
intended
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
FR418195A
Other languages
French (fr)
Inventor
Eugene William Schneider
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 FR418195A publication Critical patent/FR418195A/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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/342—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Prostheses (AREA)
FR418195A 1910-02-11 1910-07-13 Improvements in devices intended to assist hearing Expired FR418195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US418195TA 1910-02-11 1910-02-11

Publications (1)

Publication Number Publication Date
FR418195A true FR418195A (en) 1910-12-02

Family

ID=32596652

Family Applications (1)

Application Number Title Priority Date Filing Date
FR418195A Expired FR418195A (en) 1910-02-11 1910-07-13 Improvements in devices intended to assist hearing

Country Status (2)

Country Link
FR (1) FR418195A (en)
GB (1) GB191016173A (en)

Also Published As

Publication number Publication date
GB191016173A (en) 1911-03-02

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