Accession Number:

ADD002132

Title:

Statistical Noise Processor.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s):

• Grobman,Leon
• Polin,Benson
• Savage,Donald

Report Date:

1974-09-03

Pagination or Media Count:

9.0

Abstract:

The patent describes a statistical processing device for improving the signal to noise ratio of signals and transients within a noise environment. Samples of electrical signals indicative of ocean noise are applied to a calculator that obtains the mean, variance and third moment of the electrical signal. A delay circuit delays the calculator output signal for comparison with later produced electrical signal samples. A second calculator receives the outputs from the delay circuit and manipulates the difference between a first higher order moment signal to obtain an output signal having an amplitude indicative of a transient or target. The output signal is displayed on a lofargram which provides an enhanced visual indication of the sampled electrical signal contents.

Descriptors:

• *Signal processing
• *Patents
• Statistical processes
• Signal to noise ratio
• Noise
• Underwater sound

Subject Categories:

• Electrical and Electronic Equipment
• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE