FR1242763A - Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance - Google Patents

Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance

Info

Publication number
FR1242763A
FR1242763A FR813330A FR813330A FR1242763A FR 1242763 A FR1242763 A FR 1242763A FR 813330 A FR813330 A FR 813330A FR 813330 A FR813330 A FR 813330A FR 1242763 A FR1242763 A FR 1242763A
Authority
FR
France
Prior art keywords
recording
reproducing
variable
acoustic
vibrations
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
FR813330A
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
Application granted granted Critical
Publication of FR1242763A publication Critical patent/FR1242763A/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 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Springs (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR813330A 1958-12-19 1959-12-17 Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance Expired FR1242763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL234436 1958-12-19

Publications (1)

Publication Number Publication Date
FR1242763A true FR1242763A (en) 1960-09-30

Family

ID=19751489

Family Applications (1)

Application Number Title Priority Date Filing Date
FR813330A Expired FR1242763A (en) 1958-12-19 1959-12-17 Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance

Country Status (6)

Country Link
CH (1) CH375541A (en)
DE (1) DE1115302B (en)
ES (1) ES254241A1 (en)
FR (1) FR1242763A (en)
GB (1) GB934632A (en)
NL (2) NL108508C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187635A (en) * 1978-04-03 1980-02-12 Deissler Robert J Method and apparatus for sound production

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263408A (en) * 1936-04-11 1941-11-18 Lakhovsky George Means for improving the sound emitted by microphones, loudspeakers, and the like
DE1073546B (en) * 1955-05-26 1960-01-21 Rudolf Gorike Wien Dr Directional microphone with low vibration and wind sensitivity

Also Published As

Publication number Publication date
NL108508C (en)
CH375541A (en) 1964-02-29
NL234436A (en)
ES254241A1 (en) 1960-03-01
DE1115302B (en) 1961-10-19
GB934632A (en) 1963-08-21

Similar Documents

Publication Publication Date Title
FR1230712A (en) Reading device for phonographs
FR1202827A (en) Variable spacing device for xerographic recording
CH381897A (en) Stacking device for recording media
FR1128974A (en) Device for vibration damping
FR1215093A (en) Protective receptacle for phonograph or speaking machine records
FR1242763A (en) Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance
BE585777A (en) Device for recording or reproducing acoustic vibrations, provided with a variable acoustic impedance
BE590491A (en) Signal recording device.
FR1290536A (en) Sound recording device
BE578320A (en) Indicator device for mattresses.
FR1339480A (en) Perforating device for recording media
FR1227785A (en) Transducer device for recording or exploring a groove-shaped recording trace
FR1185453A (en) Device for positioning transducer heads
FR1157128A (en) Device for reproducing drawings or other objects
FR1235527A (en) Soundproofing device for fluid ejection devices
BE580556A (en) Device for, recording and / or reproducing recordings.
FR1155320A (en) Device for cleaning phonograph records
BE580282A (en) Piezoelectric transducer device in particular for phonograph read heads.
BE579829A (en) Transducer device for recording or exploring a groove-shaped recording trace.
FR1177143A (en) Device for driving sound recording media
BE583769A (en) Device for attenuating the noise of a moving fluid.
FR1230772A (en) Device for the exploitation of recording tapes
FR1367782A (en) Mechanic-electric transducer control device for record player pick-ups
BE579285A (en) Device for the exploration of numbers.
FR1419704A (en) Device for recording vertical oscillations