Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Wavelet Scattering Transforms Applied to Whale Vocalisations
Thesis (PhD)--Stellenbosch University, 2026.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Stellenbosch : Stellenbosch University
2026
|
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613827275685888 |
|---|---|
| access_status_str | Open Access |
| author | Rademan, Marco Wiehann |
| author2 | Versfeld, Daniel J. J. |
| author_browse | Rademan, Marco Wiehann Versfeld, Daniel J. J. |
| author_facet | Versfeld, Daniel J. J. Rademan, Marco Wiehann |
| author_sort | Rademan, Marco Wiehann |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (PhD)--Stellenbosch University, 2026. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/135919 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:42:19.474Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/135919 Wavelet Scattering Transforms Applied to Whale Vocalisations Rademan, Marco Wiehann Versfeld, Daniel J. J. Du Preez, Johan A. Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Thesis (PhD)--Stellenbosch University, 2026. Rademan, M. W. 2026. Wavelet Scattering Transforms Applied to Whale Vocalisations. Unpublished doctoral dissertation. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/3b33fd6b-e8d2-49f0-8d4b-8275ca1a6206 In this dissertation by publication, presented as three journal papers, we investigate the application of wavelet scattering transforms to whale vocalisations. We first consider how wavelet transforms can provide an alternative time-frequency decomposition for use in signal detectors. Detectors typically utilise the short-time Fourier transform (STFT), for which the continuous wavelet transform (CWT) serves as a suitable alternative. As an additional contribution, we improve upon the spectral entropy (SE) detector, which is known to be superior in terms of signal detection compared to energy detectors. In the second publication, we expand on the connection of the CWT to wavelet scattering. Wavelet scattering is a feature extraction method akin to the filters of a convolutional neural network frontend and mel-frequency cepstral coefficients. We show that wavelet scattering coefficients can be combined with a SE detector, which can be fed in to a classification system. We further improve upon the SE detector and provide a critical discussion on the challenges faced on a real-world dataset. Finally, the concepts established in the previous papers are used to construct an entirely new and generalised form of the wavelet scattering transform — joint n-dimensional scattering. We extend the definition of one-dimensional scattering to an arbitrary number of signal dimensions by utilising separable filters. Joint scattering benefits from various computational and conceptual advantages, which have not been generalised to this extent in the current literature. Doctoral 2026-04-15T08:18:39Z 2026-04-15T08:18:39Z 2026-03 Thesis https://scholar.sun.ac.za/handle/10019.1/135919 en Stellenbosch University 184 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Rademan, Marco Wiehann Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title | Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title_full | Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title_fullStr | Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title_full_unstemmed | Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title_short | Wavelet Scattering Transforms Applied to Whale Vocalisations |
| title_sort | wavelet scattering transforms applied to whale vocalisations |
| url | https://scholar.sun.ac.za/handle/10019.1/135919 |
| work_keys_str_mv | AT rademanmarcowiehann waveletscatteringtransformsappliedtowhalevocalisations |