Robust selection of clean swept-sine measurements in non-stationary noise

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-03-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
2117-2126
Series
The Journal of the Acoustical Society of America, Volume 151, issue 3
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
Keywords
Other note
Citation
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