EP 0728535 B1 19980826 - Process and device for reducing the resonant frequency of the cavities of submerged transducers
Title (en)
Process and device for reducing the resonant frequency of the cavities of submerged transducers
Title (de)
Verfahren und Vorrichtung zur Verminderung der Resonanzfrequenz von Hohlräumen von Unterwasserwandlern
Title (fr)
Procédé et dispositif pour diminuer la fréquence de résonance des cavités des transducteurs immergeables
Publication
Application
Priority
FR 9502093 A 19950223
Abstract (en)
[origin: EP0728535A1] The process involves utilising te electroacoustic transducer which comprises at least one housing (3) solidly attached to the end of a motor (1). A rigid hollow box (5) surrounds the housing and defines with at least one cavity (7,19) which communicates by means of an orifice (6,20) with the external fluid which fills the cavity. The cavity has dimensions and capacity chosen to provide the required resonant frequency. The passive radiator (15) consists of a material which is more dense than the surrounding fluid (4) and blocks the orifice (6,20). This is suspended by its edges at the periphery of the orifice by an elastic material (23).
IPC 1-7
IPC 8 full level
B06B 1/06 (2006.01)
CPC (source: EP US)
B06B 1/0618 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT SE
DOCDB simple family (publication)
EP 0728535 A1 19960828; EP 0728535 B1 19980826; CA 2170090 A1 19960824; DE 69600549 D1 19981001; DE 69600549 T2 19990211; FR 2731129 A1 19960830; FR 2731129 B1 19970411; US 5694374 A 19971202
DOCDB simple family (application)
EP 96400364 A 19960222; CA 2170090 A 19960222; DE 69600549 T 19960222; FR 9502093 A 19950223; US 60336396 A 19960220