A method for designing an allpass chirp for impulse response measurement that ensures a constant signal-to-noise ratio (SNR) in the measurement is presented. By using the background noise and measurement system's frequency responses, a measurement signal can be designed by specifying the group delay trajectory. This signal will have a small crest factor and will be optimally short such that the measured impulse response will have a desired and constant SNR.

Authors: Canfield-Dafilou, Elliot K.; Abel, Jonathan S.
Affiliation: Center for Computer Research in Music and Acosutics (CCRMA), Stanford University, Stanford, CA, USA
AES Convention: 144 (May 2018) Paper Number: 10014
Publication Date: May 14, 2018
Subject: Audio Processing and Effects – Part 1

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