Publication
Title
Validated exponential analysis for harmonic sounds
Author
Abstract
In audio spectral analysis, the Fourier method is popular because of its stability and its low computational complexity. It suffers however from a time-frequency resolution trade off and is not particularly suited for aperiodic signals such as exponentially decaying ones. To overcome their resolution limitation, additional techniques such as quadratic peak interpolation or peak picking, and instantaneous frequency computation from phase unwrapping are used. Parameteric methods on the other hand, overcome the timefrequency trade off but are more susceptible to noise and have a higher computational complexity. We propose a method to overcome these drawbacks: we set up regularized smaller sized independent problems and perform a cluster analysis on their combined output. The new approach validates the true physical terms in the exponential model, is robust in the presence of outliers in the data and is able to filter out any non-physical noise terms in the model. The method is illustrated in the removal of electrical humming in harmonic sounds.
Language
English
Source (journal)
International Conference on Digital Audio Effects
Source (book)
Proceedings of the 20th International Conference on Digital Audio Effects (DAFx-17), September 5-9, 2017, Edinburgh, UK
Publication
Edinburgh : University of Edinburgh, 2017
Volume/pages
20, p. 222-227
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Sub-Nyquist underwater communication.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identification
Creation 01.10.2018
Last edited 15.07.2021
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