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 language | English |
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Article number | 081601 |
Number of pages | 8 |
Journal | JASA Express Letters |
Volume | 4 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Aug 2024 |
MoE publication type | A1 Journal article-refereed |