FR2143320A1 - - Google Patents

Info

Publication number
FR2143320A1
FR2143320A1 FR7222625A FR7222625A FR2143320A1 FR 2143320 A1 FR2143320 A1 FR 2143320A1 FR 7222625 A FR7222625 A FR 7222625A FR 7222625 A FR7222625 A FR 7222625A FR 2143320 A1 FR2143320 A1 FR 2143320A1
Authority
FR
France
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.)
Withdrawn
Application number
FR7222625A
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.)
WILLCO HORGERATE MED APP
Original Assignee
WILLCO HORGERATE MED APP
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 WILLCO HORGERATE MED APP filed Critical WILLCO HORGERATE MED APP
Publication of FR2143320A1 publication Critical patent/FR2143320A1/fr
Withdrawn legal-status Critical Current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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Building Environments (AREA)
  • Steroid Compounds (AREA)
FR7222625A 1971-06-22 1972-06-22 Withdrawn FR2143320A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2130887 1971-06-22

Publications (1)

Publication Number Publication Date
FR2143320A1 true FR2143320A1 (enrdf_load_stackoverflow) 1973-02-02

Family

ID=5811444

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7222625A Withdrawn FR2143320A1 (enrdf_load_stackoverflow) 1971-06-22 1972-06-22

Country Status (8)

Country Link
BE (1) BE784997A (enrdf_load_stackoverflow)
CH (1) CH547048A (enrdf_load_stackoverflow)
DE (1) DE2130887B1 (enrdf_load_stackoverflow)
ES (1) ES404091A1 (enrdf_load_stackoverflow)
FR (1) FR2143320A1 (enrdf_load_stackoverflow)
IT (1) IT965841B (enrdf_load_stackoverflow)
NL (1) NL7208049A (enrdf_load_stackoverflow)
NO (1) NO130256B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531299B1 (fr) * 1982-08-02 1986-07-18 Depaepe Sa Henri Transducteur acousto-electrique, notamment pour microphone piezoelectrique
DE3807251A1 (de) * 1988-03-05 1989-09-14 Sennheiser Electronic Kapazitiver schallwandler

Also Published As

Publication number Publication date
BE784997A (fr) 1972-10-16
NL7208049A (enrdf_load_stackoverflow) 1972-12-28
ES404091A1 (es) 1975-05-16
NO130256B (enrdf_load_stackoverflow) 1974-07-29
DE2130887B1 (de) 1972-09-07
IT965841B (it) 1974-02-11
CH547048A (de) 1974-03-15

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Legal Events

Date Code Title Description
ST Notification of lapse