CH321708A - Device for speech transmission from rooms with a very high noise level - Google Patents

Device for speech transmission from rooms with a very high noise level

Info

Publication number
CH321708A
CH321708A CH321708DA CH321708A CH 321708 A CH321708 A CH 321708A CH 321708D A CH321708D A CH 321708DA CH 321708 A CH321708 A CH 321708A
Authority
CH
Switzerland
Prior art keywords
rooms
noise level
high noise
speech transmission
speech
Prior art date
Application number
Other languages
German (de)
Inventor
Jilske Theodor
Denkhaus Siegfried
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of CH321708A publication Critical patent/CH321708A/en

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • 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

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
CH321708D 1952-11-07 1953-11-05 Device for speech transmission from rooms with a very high noise level CH321708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE321708X 1952-11-07

Publications (1)

Publication Number Publication Date
CH321708A true CH321708A (en) 1957-05-15

Family

ID=6162943

Family Applications (1)

Application Number Title Priority Date Filing Date
CH321708D CH321708A (en) 1952-11-07 1953-11-05 Device for speech transmission from rooms with a very high noise level

Country Status (4)

Country Link
BE (1) BE524124A (en)
CH (1) CH321708A (en)
FR (1) FR1086665A (en)
NL (2) NL86513C (en)

Also Published As

Publication number Publication date
FR1086665A (en) 1955-02-15
NL86513C (en)
BE524124A (en)
NL182555B (en)

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