Accession Number:

ADD020107

Title:

Acoustic Processing for Estimating Size of Small Targets

Descriptive Note:

Patent Application, Filed 7 Aug 2003

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2003-08-07

Pagination or Media Count:

20.0

Abstract:

A method is provided for estimating the size of an object from a region of a fluid medium when that object is emitting acoustic radiation of-known wavelength lambda on its own or as the result of being interrogated by acoustic pulses that reflect from the object. The acoustic radiation is monitored using a line array of N acoustic receivers such that N signals indicative of the acoustic radiation are generated. M time series summations are formed using the N signals. Each of the M time series summations is formed using a unique time delay predicated on a corresponding unique estimated speed of propagation of the acoustic radiation where M estimated speeds of propagation are defined. For an object in the region having a diameter D on the order of lambda, the M values will vary as a function of the M estimated speeds of propagation with the resulting distribution of the M values being indicative of diameter D.

Subject Categories:

  • Acoustic Detection and Detectors
  • Underwater and Marine Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE