Non-stationary noise removal from repeated sweep measurements

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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.
Original languageEnglish
Article number081601
Number of pages8
JournalJASA Express Letters
Volume4
Issue number8
DOIs
Publication statusPublished - 1 Aug 2024
MoE publication typeA1 Journal article-refereed

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