Accession Number : ADD000211

Title :   Multichannel Noise Simulator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Fein,Maier O ; Hilt,Roy A

Report Date : 05 Mar 1974

Pagination or Media Count : 5

Abstract : The patent describes a multichannel noise simulator having a variable interchannel correlation which approximates the noise found at the output of an array of hydrophones. The simulator can be adjusted to control interchannel correlation to simulate a real array noise which can vary from being completely uncorrelated to highly correlated. The output of a band limited noise source is switched sequentially from one output line to the next at a fixed sample rate. Since the sample has a correlation proportional to the reciprocal of the bandwidth, the correlation is varied by varying the bandwidth of the input noise. The change of sample rate thus permits the noise in various channels of the multichannel simulator to range from uncorrelated to highly correlated.

Descriptors :   *Noise generators, *Simulators, *Patents, Multichannel, Acoustic arrays, Hydrophones

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE