FR788990A - Acoustic horn - Google Patents

Acoustic horn

Info

Publication number
FR788990A
FR788990A FR788990DA FR788990A FR 788990 A FR788990 A FR 788990A FR 788990D A FR788990D A FR 788990DA FR 788990 A FR788990 A FR 788990A
Authority
FR
France
Prior art keywords
acoustic horn
horn
acoustic
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 FR788990A publication Critical patent/FR788990A/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR788990D 1934-04-25 1935-04-18 Acoustic horn Expired FR788990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US788990XA 1934-04-25 1934-04-25

Publications (1)

Publication Number Publication Date
FR788990A true FR788990A (en) 1935-10-21

Family

ID=22146885

Family Applications (1)

Application Number Title Priority Date Filing Date
FR788990D Expired FR788990A (en) 1934-04-25 1935-04-18 Acoustic horn

Country Status (1)

Country Link
FR (1) FR788990A (en)

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