FR541251A - Device for the suppression of disturbances in acoustic reception - Google Patents

Device for the suppression of disturbances in acoustic reception

Info

Publication number
FR541251A
FR541251A FR541251DA FR541251A FR 541251 A FR541251 A FR 541251A FR 541251D A FR541251D A FR 541251DA FR 541251 A FR541251 A FR 541251A
Authority
FR
France
Prior art keywords
disturbances
suppression
acoustic reception
acoustic
reception
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.)
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 FR541251A publication Critical patent/FR541251A/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
FR541251D 1920-04-03 1921-03-30 Device for the suppression of disturbances in acoustic reception Expired FR541251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1715831X 1920-04-03

Publications (1)

Publication Number Publication Date
FR541251A true FR541251A (en) 1922-07-25

Family

ID=7740401

Family Applications (1)

Application Number Title Priority Date Filing Date
FR541251D Expired FR541251A (en) 1920-04-03 1921-03-30 Device for the suppression of disturbances in acoustic reception

Country Status (2)

Country Link
US (1) US1715831A (en)
FR (1) FR541251A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472107A (en) * 1936-05-06 1949-06-07 Harvey C Hayes Acoustical apparatus
US2518805A (en) * 1945-08-24 1950-08-15 Massa Frank Resonant chamber for microphones
US2571979A (en) * 1946-04-19 1951-10-16 Conn Ltd C G Acoustic measuring apparatus
US2552309A (en) * 1947-10-10 1951-05-08 Rca Corp Acoustic diaphragm and baffle
US2739659A (en) * 1950-09-05 1956-03-27 Fred B Daniels Acoustic device
US2704133A (en) * 1951-01-26 1955-03-15 Telephonics Corp Acoustic filter
BE518558A (en) * 1952-03-20
US2987699A (en) * 1953-11-17 1961-06-06 Miller Theadore Homing-torpedo reverberation-attenuating transducer apparatus
US3723954A (en) * 1956-08-24 1973-03-27 Us Navy Reverberation filter system
US3028450A (en) * 1959-01-20 1962-04-03 Dennis J Manning Gas leak detection apparatus
US3210724A (en) * 1962-09-13 1965-10-05 Aeroprojects Inc Vibratory energy radiating system
DE1284756B (en) * 1966-11-17 1968-12-05 Euratom Device for detecting leaks in pressure pipelines
US4220831A (en) * 1978-07-17 1980-09-02 Zink Henry R Intrusion sensing device
US4337640A (en) * 1979-04-10 1982-07-06 Nissan Motor Co., Ltd. Knocking sensor
FR2824990B1 (en) * 2001-05-15 2003-09-26 Jean Pierre Morkerken SOUND TRANSMITTER AND SPEAKER
US7618666B2 (en) * 2004-05-17 2009-11-17 Morando E Donald Edible candy confection with improved shelf-life and method of making thereof

Also Published As

Publication number Publication date
US1715831A (en) 1929-06-04

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