FR2316825A1 - Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades - Google Patents

Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades

Info

Publication number
FR2316825A1
FR2316825A1 FR7520713A FR7520713A FR2316825A1 FR 2316825 A1 FR2316825 A1 FR 2316825A1 FR 7520713 A FR7520713 A FR 7520713A FR 7520713 A FR7520713 A FR 7520713A FR 2316825 A1 FR2316825 A1 FR 2316825A1
Authority
FR
France
Prior art keywords
hydrophone
heart
acoustic decoupling
transducer
air blades
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.)
Granted
Application number
FR7520713A
Other languages
French (fr)
Other versions
FR2316825B1 (en
Inventor
Monique Rolland
Epouse Richard
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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR7520713A priority Critical patent/FR2316825A1/en
Publication of FR2316825A1 publication Critical patent/FR2316825A1/en
Application granted granted Critical
Publication of FR2316825B1 publication Critical patent/FR2316825B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0603—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a piezoelectric bender, e.g. bimorph
    • 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
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone

Abstract

Under sea low frequency acoustic waves are received by a hydrophone with a single cardioide shaped directive lobe. The hydrophone employs a single transducer and detects and locates buoys. The external envelope of the hydrophone comprises a cylindrical container (1) in which two main parts (1a, 1b) are separated by a rubber disc (13) of the same diameter as the container. The rear part (1a) contains an acoustic window (11) while the front part (1b) comprises a lateral face (8) separated from a base (4) by a circular window (5) to form a cavity. In front of the cavity is a flexing blade (2) piezoelectric transducer. Thin boundaries (6, 7) form thin blades of air (9, 10) in the lateral face and base to provide acoustic decoupling to ensure reception from the front only.
FR7520713A 1975-07-02 1975-07-02 Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades Granted FR2316825A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7520713A FR2316825A1 (en) 1975-07-02 1975-07-02 Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7520713A FR2316825A1 (en) 1975-07-02 1975-07-02 Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades

Publications (2)

Publication Number Publication Date
FR2316825A1 true FR2316825A1 (en) 1977-01-28
FR2316825B1 FR2316825B1 (en) 1977-12-16

Family

ID=9157371

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7520713A Granted FR2316825A1 (en) 1975-07-02 1975-07-02 Hydrophone with heart-shaped directivity lobe - employs single flexing blade transducer and acoustic decoupling air blades

Country Status (1)

Country Link
FR (1) FR2316825A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657213A1 (en) * 1990-01-18 1991-07-19 France Etat Armement Directional electroacoustic transducers which can be used as hydrophones

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE607360C (en) * 1933-08-31 1934-12-22 Siemens App Underwater sound transmitter
US2406767A (en) * 1932-10-22 1946-09-03 Harvey C Hayes Directive transceiver for sound

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406767A (en) * 1932-10-22 1946-09-03 Harvey C Hayes Directive transceiver for sound
DE607360C (en) * 1933-08-31 1934-12-22 Siemens App Underwater sound transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657213A1 (en) * 1990-01-18 1991-07-19 France Etat Armement Directional electroacoustic transducers which can be used as hydrophones

Also Published As

Publication number Publication date
FR2316825B1 (en) 1977-12-16

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Legal Events

Date Code Title Description
ST Notification of lapse