Design and Evaluation of Perceptually Pleasant Calibration Signals for Automated Loudspeaker Localisation
Author
Ahrendt, Peter
Term
4. Term
Education
Publication year
2018
Submitted on
2018-05-29
Pages
102
Abstract
It was attempted to find a pleasant signal for automated audio system calibration through play back. A simple use case was defined where the time of arrival (TOA) should be estimated from one source to receiver in corrupting noise and reverberation. Interviews with experts and research were used to determine necessary characteristics of a possible calibration signal. A self designed sound and other suitable sounds were rated in a listening experiment. The winner was tested in a virtual testing framework against a traditional signal. The traditional signal outperformed the pleasant one. Methods were applied to modify the pleasant signal in order to increase its performance. It was hypothesised that a wide spectral bandwidth or at least high frequencies are crucial for TOA estimation. High frequency pseudorandom noise was added to the pleasant signal according to and beyond its masking curves with an increase of TOA estimation performance but a decrease of perceptual quality.
Documents