A master thesis from Aalborg University
Design and Evaluation of Perceptually Pleasant Calibration Signals for Automated Loudspeaker Localisation
Author(s)
Term
4. Term
Education
Publication year
2018
Submitted on
2018-05-29
Pages
102 pages
Abstract
It was attempted to find a pleasant sig- nal for automated audio system cali- bration through play back. A simple use case was defined where the time of arrival (TOA) should be estimated from one source to receiver in cor- rupting noise and reverberation. Inter- views with experts and research were used to determine necessary character- istics of a possible calibration signal. A self designed sound and other suitable sounds were rated in a listening exper- iment. The winner was tested in a vir- tual testing framework against a tra- ditional signal. The traditional signal outperformed the pleasant one. Meth- ods were applied to modify the pleas- ant signal in order to increase its per- formance. It was hypothesised that a wide spectral bandwidth or at least high frequencies are crucial for TOA estimation. High frequency pseudo- random noise was added to the pleas- ant signal according to and beyond its masking curves with an increase of TOA estimation performance but a de- crease of perceptual quality.
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