Low-Frequency Underwater Acoustic Signal Processing and Applications

Dear Colleagues,

Low-frequency underwater acoustic signal processing plays a pivotal role in marine exploration, environmental monitoring, and underwater communication systems. Due to the unique propagation characteristics of low-frequency signals (typically below 1 kHz) in water—such as reduced attenuation and long-range transmission—they are indispensable for applications like underwater target detection, seismic activity monitoring, marine biodiversity studies, and underwater vehicle navigation. However, the complex underwater environment, characterized by ambient noise, multipath interference, and dynamic channel variations, poses significant challenges to signal acquisition, analysis, and interpretation.

Key research areas focus on enhancing signal-to-noise ratio (SNR) in the low-frequency range through adaptive filtering and beamforming techniques, developing robust algorithms for feature extraction and recognition in noisy environments, and improving localization accuracy via time/frequency/space processing. Additionally, artificial intelligence-based methods are increasingly demonstrating critical importance in the low-frequency range of underwater acoustic signal processing. These advancements strengthen global capabilities in safeguarding maritime security and sustainable ocean development.

The aim of this Special Issue of Electronics is to present state-of-the-art investigations in various methods for low-frequency underwater acoustic signal processing and applications. We invite researchers to contribute original high-quality articles, as well as sophisticated review articles.

Prof. Dr. Yong Wang
Prof. Dr. Peng Xiao
Prof. Dr. Long Yang
Guest Editors

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