State-of-the art impulse response measurement technique imposes a measurement latency that constrains real-time application. This paper proposes a first swept-sine technique that can update subsequent impulse responses within a latency of one recording sample. We verify the technique for various LTI and non-LTI measurement setups by driving a mannequin through a test room. The extracted impulse responses correspond widely to conventional swept-sine technique, while we achieve an eight times higher update rate with our implementation on a conventional laptop. The observed mean error for the LTI case is -60 dB, and builds up to -35 dB with increasing LTI violation. We anticipate, the technique can significantly improve the resolution of ultrasound sensing, monitor quick changes in reflective environment or extract impulse responses for augmented reality applications at immersive update rate.
Affiliations: Department of Computer Science, ETH Zurich, Zurich, Switzerland; Xilev UG, Schwabach, Germany(See document for exact affiliation information.)
AES Convention: 150 (May 2021) Paper Number: 10449
Publication Date: May 24, 2021
Subject: Acoustic Measurement
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