FR19534E - Poste téléphonique haut parleur - Google Patents

Poste téléphonique haut parleur

Info

Publication number
FR19534E
FR19534E FR19534A FR19534DA FR19534E FR 19534 E FR19534 E FR 19534E FR 19534 A FR19534 A FR 19534A FR 19534D A FR19534D A FR 19534DA FR 19534 E FR19534 E FR 19534E
Authority
FR
France
Prior art keywords
loudspeaker telephone
loudspeaker
telephone
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
FR19534A
Other languages
English (en)
Inventor
Charles Forgues
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
Publication date
Application granted granted Critical
Publication of FR19534E publication Critical patent/FR19534E/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
    • 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
    • H04R1/345—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 loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/62—Constructional arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
FR19534A Poste téléphonique haut parleur Expired FR19534E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR19534T

Publications (1)

Publication Number Publication Date
FR19534E true FR19534E (fr) 1915-02-26

Family

ID=8660075

Family Applications (2)

Application Number Title Priority Date Filing Date
FR19534A Expired FR19534E (fr) Poste téléphonique haut parleur
FR472586D Active FR472586A (fr)

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR472586D Active FR472586A (fr)

Country Status (1)

Country Link
FR (2) FR472586A (fr)

Also Published As

Publication number Publication date
FR472586A (fr)

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