Robust selection of clean swept-sine measurements in non-stationary noise
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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10
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The Journal of the Acoustical Society of America, Volume 151, issue 3, pp. 2117-2126
Abstract
The exponential sine sweep is a commonly used excitation signal in acoustic measurements, which, however, is susceptible to non-stationary noise. This paper shows how to detect contaminated sweep signals and select clean ones based on a procedure called the rule of two, which analyzes repeated sweep measurements. A high correlation between a pair of signals indicates that they are devoid of non-stationary noise. The detection threshold for the correlation is determined based on the energy of background noise and time variance. Not being disturbed by non-stationary events, a median-based method is suggested for reliable background noise energy estimation. The proposed method is shown to detect reliably 95% of impulsive noises and 75% of dropouts in the synthesized sweeps. Tested on a large set of measurements and compared with a previous method, the proposed method is shown to be more robust in detecting various non-stationary disturbances, improving the detection rate by 30 percentage points. The rule-of-two procedure increases the robustness of practical acoustic and audio measurements. (C) 2022 Author(s).All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY)license (http://creativecommons.org/licenses/by/4.0/).Description
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Prawda, K, Schlecht, S & Välimäki, V 2022, 'Robust selection of clean swept-sine measurements in non-stationary noise', The Journal of the Acoustical Society of America, vol. 151, no. 3, pp. 2117-2126. https://doi.org//10.1121/10.0009915