Volume 104, Issue 5, November 1998
Index of content:
- ACOUSTIC SIGNAL PROCESSING 
The Wagstaff’s integration silencing processor filter: A method for exploiting fluctuations to achieve improved sonar signal processor performance104(1998); http://dx.doi.org/10.1121/1.423875View Description Hide Description
There is a class of signal processing algorithms that achieves gain by exploiting the amplitude fluctuations in the spectrum analyzed acoustic power. One of those processors is presented. The causes of fluctuations that influence the performance of such processors are discussed, and processed results from a fluctuation-based processor are presented. Gains relative to the average power processor in signal-to-noise ratio (SNR) of as much as 10 dB, and gains in spatial and spectral resolution, minimum detectable levels, and other measures of processor performance have been achieved. For the most part, the additional gains from exploiting fluctuations are independent of the frequency resolution and the array aperture (or number of elements if the noise is “white”) and depend on the number of averages and percent of overlap of consecutive time-to frequency fast Fourier transforms (FFT).