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FR755352A - Sound collecting device - Google Patents

Sound collecting device

Info

Publication number
FR755352A
FR755352A FR755352DA FR755352A FR 755352 A FR755352 A FR 755352A FR 755352D A FR755352D A FR 755352DA FR 755352 A FR755352 A FR 755352A
Authority
FR
France
Prior art keywords
collecting device
sound collecting
sound
collecting
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Application granted granted Critical
Publication of FR755352A publication Critical patent/FR755352A/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)
FR755352D 1932-05-20 1933-05-10 Sound collecting device Expired FR755352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US755352XA 1932-05-20 1932-05-20

Publications (1)

Publication Number Publication Date
FR755352A true FR755352A (en) 1933-11-23

Family

ID=22126393

Family Applications (1)

Application Number Title Priority Date Filing Date
FR755352D Expired FR755352A (en) 1932-05-20 1933-05-10 Sound collecting device

Country Status (1)

Country Link
FR (1) FR755352A (en)

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