Robust selection of clean swept-sine measurements in non-stationary noise
Prawda K, Schlecht SJ, Välimäki V (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 151
Pages Range: 2117-2126
Journal Issue: 3
DOI: 10.1121/10.0009915
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.
Involved external institutions
Finland (FI)How to cite
APA:
Prawda, K., Schlecht, S.J., & Välimäki, V. (2022). Robust selection of clean swept-sine measurements in non-stationary noise. Journal of the Acoustical Society of America, 151(3), 2117-2126. https://dx.doi.org/10.1121/10.0009915
MLA:
Prawda, Karolina, Sebastian J. Schlecht, and Vesa Välimäki. "Robust selection of clean swept-sine measurements in non-stationary noise." Journal of the Acoustical Society of America 151.3 (2022): 2117-2126.
BibTeX: Download