EFFECT ON SIGNAL TO NOISE RATIO OF CLIPPING ARCTIC ACOUSTIC DATA

PDF

Authors
  1. Zakarauskas, P.
  2. Hamm, C.A.
  3. Thorleifson, J.M.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
Arctic ambient noise is characterized by the presence of transients due to ice cracking. The present document reports the results of an investigation into the effect on signal to noise ratio (SNR) of clipping ambient noise time series to which artifical sinusoid signals had been added. Because the ambient noise contains more power at low frequencies than at high frequencies, it was deemed necessary to bandpass filter the time series before clipping. The effect of clipping on SNR was found to depend strongly on frequency. At low frequency (f less than or equals to 40Hz) the SNR was not greatly affected by clipping. At higher frequencies, however, clipping was found to improve the SNR, by as much as 5 dB.
Keywords
Transients
Report Number
DREP-TM-90-17 — Technical Memorandum
Date of publication
01 Dec 1990
Number of Pages
13
DSTKIM No
95-01533
CANDIS No
149088
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: