FR712451A - Improvements to speech delivery systems or the like - Google Patents

Improvements to speech delivery systems or the like

Info

Publication number
FR712451A
FR712451A FR712451DA FR712451A FR 712451 A FR712451 A FR 712451A FR 712451D A FR712451D A FR 712451DA FR 712451 A FR712451 A FR 712451A
Authority
FR
France
Prior art keywords
delivery systems
speech delivery
speech
systems
delivery
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.)
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 FR712451A publication Critical patent/FR712451A/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
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR712451D 1930-03-04 1931-03-03 Improvements to speech delivery systems or the like Expired FR712451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US374120XA 1930-03-04 1930-03-04

Publications (1)

Publication Number Publication Date
FR712451A true FR712451A (en) 1931-10-02

Family

ID=21894197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR712451D Expired FR712451A (en) 1930-03-04 1931-03-03 Improvements to speech delivery systems or the like

Country Status (2)

Country Link
FR (1) FR712451A (en)
GB (1) GB374120A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100698B (en) * 1956-11-07 1961-03-02 Vakutronik Dresden Veb Equipment with microphone, amplifier and loudspeaker to amplify the human voice

Also Published As

Publication number Publication date
GB374120A (en) 1932-06-06

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