Non-stationary noise removal from repeated sweep measurements

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2024-08-01

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en

Pages

8

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JASA Express Letters, Volume 4, issue 8

Abstract

Acoustic measurements using sine sweeps are prone to background noise and non-stationary disturbances. Repeated measurements can be averaged to improve the resulting signal-to-noise ratio. However, averaging leads to poor rejection of non-stationary high-energy disturbances and, in the case of a time-variant environment, causes attenuation at high frequencies. This paper proposes a robust method to combine repeated sweep measurements using across-measurement median filtering in the time-frequency domain. The method, called Mosaic, successfully rejects non-stationary noise, suppresses background noise, and is more robust toward time variation than averaging. The proposed method allows high-quality measurement of impulse responses in a noisy environment.

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Prawda, K, Schlecht, S J & Välimäki, V 2024, ' Non-stationary noise removal from repeated sweep measurements ', JASA Express Letters, vol. 4, no. 8, 081601 . https://doi.org/10.1121/10.0028203