Projects per year
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/).
Original language | English |
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Pages (from-to) | 2117-2126 |
Number of pages | 10 |
Journal | The Journal of the Acoustical Society of America |
Volume | 151 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Mar 2022 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Robust selection of clean swept-sine measurements in non-stationary noise'. Together they form a unique fingerprint.Projects
- 1 Finished
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NordicSMC: Nordic Sound and Music Computing Network
Välimäki, V. (Principal investigator)
01/01/2018 → 31/12/2023
Project: Other external funding: Other foreign funding
Equipment
Press/Media
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Akustiikkaa voi nyt mitata luotettavammin kuin koskaan, väittävät Aalto-yliopiston tutkijat – kaikki perustuu ”sinipyyhkäisyyn”
Välimäki, V., Prawda, K. & Schlecht, S.
30/03/2022
1 item of Media coverage
Press/Media: Media appearance
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Huoneakustiikkaa voidaan mitata nyt paremmin
29/03/2022
1 item of Media coverage
Press/Media: Media appearance