Non-stationary noise removal from repeated sweep measurements
Prawda K, Schlecht S, Välimäki V (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 4
Article Number: 081601
Journal Issue: 8
DOI: 10.1121/10.0028203
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.
Authors with CRIS profile
Involved external institutions
Finland (FI)How to cite
APA:
Prawda, K., Schlecht, S., & Välimäki, V. (2024). Non-stationary noise removal from repeated sweep measurements. JASA Express Letters, 4(8). https://doi.org/10.1121/10.0028203
MLA:
Prawda, Karolina, Sebastian Schlecht, and Vesa Välimäki. "Non-stationary noise removal from repeated sweep measurements." JASA Express Letters 4.8 (2024).
BibTeX: Download