FR1370930A - Loudspeaker arranged in a case provided at the front with one or more openings - Google Patents

Loudspeaker arranged in a case provided at the front with one or more openings

Info

Publication number
FR1370930A
FR1370930A FR946777A FR946777A FR1370930A FR 1370930 A FR1370930 A FR 1370930A FR 946777 A FR946777 A FR 946777A FR 946777 A FR946777 A FR 946777A FR 1370930 A FR1370930 A FR 1370930A
Authority
FR
France
Prior art keywords
openings
case provided
loudspeaker arranged
loudspeaker
case
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
FR946777A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to FR946777A priority Critical patent/FR1370930A/en
Application granted granted Critical
Publication of FR1370930A publication Critical patent/FR1370930A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR946777A 1963-09-06 1963-09-06 Loudspeaker arranged in a case provided at the front with one or more openings Expired FR1370930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR946777A FR1370930A (en) 1963-09-06 1963-09-06 Loudspeaker arranged in a case provided at the front with one or more openings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR946777A FR1370930A (en) 1963-09-06 1963-09-06 Loudspeaker arranged in a case provided at the front with one or more openings

Publications (1)

Publication Number Publication Date
FR1370930A true FR1370930A (en) 1964-08-28

Family

ID=8811880

Family Applications (1)

Application Number Title Priority Date Filing Date
FR946777A Expired FR1370930A (en) 1963-09-06 1963-09-06 Loudspeaker arranged in a case provided at the front with one or more openings

Country Status (1)

Country Link
FR (1) FR1370930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4239945A (en) * 1976-12-15 1980-12-16 Matsushita Electric Industrial Co., Ltd. Sealed headphone
US4303807A (en) * 1978-10-18 1981-12-01 Olympus Optical Co., Ltd. Ultra-small portable sound reproducing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4239945A (en) * 1976-12-15 1980-12-16 Matsushita Electric Industrial Co., Ltd. Sealed headphone
US4303807A (en) * 1978-10-18 1981-12-01 Olympus Optical Co., Ltd. Ultra-small portable sound reproducing apparatus

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