GB914274A - Improvements in or relating to variable impedance acoustic resonators - Google Patents

Improvements in or relating to variable impedance acoustic resonators

Info

Publication number
GB914274A
GB914274A GB2686660A GB2686660A GB914274A GB 914274 A GB914274 A GB 914274A GB 2686660 A GB2686660 A GB 2686660A GB 2686660 A GB2686660 A GB 2686660A GB 914274 A GB914274 A GB 914274A
Authority
GB
United Kingdom
Prior art keywords
duct
relating
variable impedance
aug
acoustic resonators
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
GB2686660A
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.)
Automobiles Citroen SA
Original Assignee
Andre Citroen SA
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 Andre Citroen SA filed Critical Andre Citroen SA
Publication of GB914274A publication Critical patent/GB914274A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/04—Acoustic filters ; Acoustic resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C1/00—Circuit elements having no moving parts
    • F15C1/16—Vortex devices, i.e. devices in which use is made of the pressure drop associated with vortex motion in a fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/26—Devices characterised by the use of fluids

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

914,274. Resonators. CITROEN S.A., ANDRE. Aug. 3, 1960 [Aug. 7, 1959], No. 26866/60. Class 13. A resonator whose resonant frequency may be varied comprises a cylindrical vessel 6, arranged to be connected to a duct 10 via a rotatable orifice 8. The inflow or outflow from the orifice creates a vortex whose effect on the inertance of the duct varies with the angle α. The angle of rotation may be controlled by a lever 11 carrying a pointer moving over a scale calibrated in frequency. Resonance may be detected by a hot-wire anemometer situated within the duct 10.
GB2686660A 1959-08-07 1960-08-03 Improvements in or relating to variable impedance acoustic resonators Expired GB914274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR802320A FR1241787A (en) 1959-08-07 1959-08-07 Variable impedance acoustic resonator

Publications (1)

Publication Number Publication Date
GB914274A true GB914274A (en) 1963-01-02

Family

ID=8718103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2686660A Expired GB914274A (en) 1959-08-07 1960-08-03 Improvements in or relating to variable impedance acoustic resonators

Country Status (4)

Country Link
BE (1) BE593636A (en)
FR (1) FR1241787A (en)
GB (1) GB914274A (en)
LU (1) LU39035A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271494A (en) * 1992-08-26 1994-04-13 Daimler Benz Ag Variable cavity resonator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271494A (en) * 1992-08-26 1994-04-13 Daimler Benz Ag Variable cavity resonator

Also Published As

Publication number Publication date
FR1241787A (en) 1960-09-23
BE593636A (en) 1960-12-01
LU39035A1 (en) 1960-10-03

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