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International Journal of Electronics and Telecommunications

The Journal of Committee of Electronics and Telecommunications of Polish Academy of Sciences

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CiteScore 2016: 0.72

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Source Normalized Impact per Paper (SNIP) 2016: 0.542

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Volume 59, Issue 1 (Mar 2013)


A Spectral Subtraction Based Algorithm for Real-time Noise Cancellation with Application to Gunshot Acoustics

António L. L. Ramos / Sverre Holm / Sigmund Gudvangen / Ragnvald Otterlei
Published Online: 2013-04-12 | DOI: https://doi.org/10.2478/eletel-2013-0011


This paper introduces an improved spectral subtraction based algorithm for real-time noise cancellation, applied to gunshot acoustical signals. The derivation is based on the fact that, in practice, relatively long periods without gunshot signals occur and the background noise can be modeled as being short-time stationary and uncorrelated to the impulsive gunshot signals. Moreover, gunshot signals, in general, have a spiky autocorrelation while typical vehicle noise, or related, is periodic and exhibits a wider autocorrelation. The Spectral Suppression algorithm is applied using the pre-filtering approach, as opposed to post-filtering which requires a priori knowledge of the direction of arrival of the signals of interest, namely, the Muzzle blast and the Shockwave. The results presented in this work are based on a dataset generated by combining signals from real gunshots and real vehicle noise.

Keywords: gunshot acoustics; noise cancellation; spectral suppression; counter sniper systems

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About the article

Published Online: 2013-04-12

Published in Print: 2013-03-01

Citation Information: International Journal of Electronics and Telecommunications, ISSN (Print) 0867-6747, DOI: https://doi.org/10.2478/eletel-2013-0011.

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