Accession Number : ADD000588

Title :   Strum Noise Reducing Device.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Watlington,Francis W

Report Date : 14 Jan 1975

Pagination or Media Count : 4

Abstract : A device for reducing noise in a towed hydrophone system caused by cable strum is provided according to the patent, by producing a signal that is proportional to the strum signal but is uninfluenced by the acoustic signal. A geophone, an accelerometer or a strain gauge may be suitably positioned to be sensitive only to the distortion caused by cable strum. The strum signal thus detected is introduced in opposition to the combined acoustic and strum signal received by the hydrophone so that strum noise in the acoustic signal is erased or substantially deleted.

Descriptors :   *Noise reduction, *Patents, Hydrophones, Towed bodies, Strumming

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE