FR524959A - Installation of sound equipment - Google Patents

Installation of sound equipment

Info

Publication number
FR524959A
FR524959A FR524959A FR524959DA FR524959A FR 524959 A FR524959 A FR 524959A FR 524959 A FR524959 A FR 524959A FR 524959D A FR524959D A FR 524959DA FR 524959 A FR524959 A FR 524959A
Authority
FR
France
Prior art keywords
installation
sound equipment
sound
equipment
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
FR524959A
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.)
Signal GmbH
Original Assignee
Signal GmbH
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 Signal GmbH filed Critical Signal GmbH
Application granted granted Critical
Publication of FR524959A publication Critical patent/FR524959A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electromagnets (AREA)
FR524959A 1917-08-07 1920-07-08 Installation of sound equipment Expired FR524959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE345579T 1917-08-07

Publications (1)

Publication Number Publication Date
FR524959A true FR524959A (en) 1921-09-13

Family

ID=33459965

Family Applications (1)

Application Number Title Priority Date Filing Date
FR524959A Expired FR524959A (en) 1917-08-07 1920-07-08 Installation of sound equipment

Country Status (5)

Country Link
US (1) US1640538A (en)
DE (1) DE345579C (en)
FR (1) FR524959A (en)
GB (1) GB147940A (en)
NL (1) NL9442C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920307A (en) * 1954-07-19 1960-01-05 Jersey Prod Res Co Variable gap reluctance transducer
US3725856A (en) * 1956-09-24 1973-04-03 Us Navy Push-pull transducer
US2906995A (en) * 1956-11-14 1959-09-29 Jersey Prod Res Co Variable gap reluctance transducer
US3260990A (en) * 1962-01-03 1966-07-12 Dynamics Corp America Electroacoustic transducer
US3611280A (en) * 1968-05-10 1971-10-05 Marshall E Sheehy Detection means
US3538494A (en) * 1968-11-26 1970-11-03 Hazeltine Research Inc Acoustic conversion apparatus
US4757548A (en) * 1985-12-02 1988-07-12 Fenner Jr Thomas C Speaker system and dome-shaped enclosure therefor
US4763307A (en) * 1987-01-20 1988-08-09 Frank Massa Wide-range audio frequency underwater transducer
US5117403A (en) * 1991-05-31 1992-05-26 Adolf Eberl Above and below water sound transducer
US8488415B2 (en) 2010-08-26 2013-07-16 Curtis E. Graber Submersible electro-dynamic acoustic projector

Also Published As

Publication number Publication date
GB147940A (en) 1921-10-10
DE345579C (en) 1921-12-14
NL9442C (en)
US1640538A (en) 1927-08-30

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