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Machine Learning in Acoustic Signal Processing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 737

Special Issue Editors


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Guest Editor
School of Electronics Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: acoustic signal processing; machine learning; array signal processing; source separation
Institute of Acoustics CAS, University of Chinese Academy of Sciences, Beijing 100190, China
Interests: 3D audio systems and acoustic signal processing; array signal processing and intelligent structures; acoustic and vibration control; nonlinear acoustics; digital signal processing and its applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the last decade, acoustic signal processing techniques have been greatly improved with machine learning. For example, while the conventional algorithms, such as Independent Component Analysis, were based on the statistical characteristics of the target signals, recent algorithms, such as Conv-TasNet, have been developed based on machine learning techniques. In addition, several research areas covered by the conventional acoustic signal processing algorithms, e.g., acoustic echo cancellation or system identification, have also made significant advances with the help of machine learning.

Machine learning not only enhances the acoustic signal processing algorithms but also expands its area of application. In recent research, acoustic signal processing algorithms have been found to be capable of recognizing acoustic events, detecting abnormal sounds, and even compressing acoustic signals or generating desired sound signals, among other notable results.

The Special Issue aims to bring together recent advances in machine learning techniques for the acoustic signal processing problems. The research areas may include (but are not limited to) the following: 

  1. Enhancement or estimation of desired acoustic signals, e.g., noise suppression or source separation;
  2. Detection or classification of acoustic scene and events;
  3. Retrieval of music or semantic information from acoustic signals;
  4. Generative algorithms for acoustic signals;
  5. Machine learning techniques for compression of the sound signals;
  6. Machine learning-based underwater acoustic signal processing algorithms.

Dr. Seokjin Lee
Dr. Jun Yang
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • acoustic signal processing
  • machine learning
  • source separation
  • sound event detection
  • information retrieval
  • generative model
  • acoustic signal compression
  • underwater acoustics

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Published Papers (1 paper)

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Research

18 pages, 3228 KiB  
Article
Automatic Detection and Unsupervised Clustering-Based Classification of Cetacean Vocal Signals
by Yinian Liang, Yan Wang, Fangjiong Chen, Hua Yu, Fei Ji and Yankun Chen
Appl. Sci. 2025, 15(7), 3585; https://doi.org/10.3390/app15073585 - 25 Mar 2025
Viewed by 315
Abstract
In the ocean environment, passive acoustic monitoring (PAM) is an important technique for the surveillance of cetacean species. Manual detection for a large amount of PAM data is inefficient and time-consuming. To extract useful features from a large amount of PAM data for [...] Read more.
In the ocean environment, passive acoustic monitoring (PAM) is an important technique for the surveillance of cetacean species. Manual detection for a large amount of PAM data is inefficient and time-consuming. To extract useful features from a large amount of PAM data for classifying different cetacean species, we propose an automatic detection and unsupervised clustering-based classification method for cetacean vocal signals. This paper overcomes the limitations of the traditional threshold-based method, and the threshold is set adaptively according to the mean value of the signal energy in each frame. Furthermore, we also address the problem of the high cost of data training and labeling in deep-learning-based methods by using the unsupervised clustering-based classification method. Firstly, the automatic detection method extracts vocal signals from PAM data and, at the same time, removes clutter information. Then, the vocal signals are analyzed for classification using a clustering algorithm. This method grabs the acoustic characteristics of vocal signals and distinguishes them from environmental noise. We process 194 audio files in a total of 25.3 h of vocal signal from two marine mammal public databases. Five kinds of vocal signals from different cetaceans are extracted and assembled to form 8 datasets for classification. The verification experiments were conducted on four clustering algorithms based on two performance metrics. The experimental results confirm the effectiveness of the proposed method. The proposed method automatically removes about 75% of clutter data from 1581.3MB of data in audio files and extracts 75.75 MB of the features detected by our algorithm. Four classical unsupervised clustering algorithms are performed on the datasets we made for verification and obtain an average accuracy rate of 84.83%. Full article
(This article belongs to the Special Issue Machine Learning in Acoustic Signal Processing)
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