FR673844A - Improvements to acoustic breeders - Google Patents

Improvements to acoustic breeders

Info

Publication number
FR673844A
FR673844A FR673844DA FR673844A FR 673844 A FR673844 A FR 673844A FR 673844D A FR673844D A FR 673844DA FR 673844 A FR673844 A FR 673844A
Authority
FR
France
Prior art keywords
breeders
acoustic
acoustic breeders
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR673844A publication Critical patent/FR673844A/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
FR673844D 1928-06-23 1929-04-22 Improvements to acoustic breeders Expired FR673844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB673844X 1928-06-23

Publications (1)

Publication Number Publication Date
FR673844A true FR673844A (en) 1930-01-20

Family

ID=10491911

Family Applications (1)

Application Number Title Priority Date Filing Date
FR673844D Expired FR673844A (en) 1928-06-23 1929-04-22 Improvements to acoustic breeders

Country Status (1)

Country Link
FR (1) FR673844A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103482A (en) * 1988-07-28 1992-04-07 Fabri Conti Lucas Apparatus and method for reproducing high fidelity sound

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103482A (en) * 1988-07-28 1992-04-07 Fabri Conti Lucas Apparatus and method for reproducing high fidelity sound

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