On the Challenges of Acoustic Energy Mapping Using a WASN: Synchronization and Audio Capture

Article Chemistry, Multidisciplinary

Fast Sound Source Localization Based on SRP-PHAT Using Density Peaks Clustering

De-Bing Zhuo et al.

Summary: This article proposes an improved sound source localization method ODB-SRP-PHAT, which first determines possible sound source positions through density peak clustering before real-time localization and stores them in an online database, reducing computational load significantly while maintaining high localization accuracy.

APPLIED SCIENCES-BASEL (2021)

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Article Acoustics

So you think you can DAS? A viewpoint on delay-and-sum beamforming

Vincent Perrot et al.

Summary: Delay-and-sum (DAS) is a commonly used digital beamformer in high-frame-rate ultrasound imaging, with simple implementation and compatibility with real-time applications. Optimizing parameters such as f-number and speed of sound can improve image quality and prevent negative impact on standard metrics.

ULTRASONICS (2021)

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Article Biology

Bio-acoustic tracking and localization using heterogeneous, scalable microphone arrays

Erik Verreycken et al.

Summary: Verreycken and colleagues have developed a large, flexible microphone array system for bio-acoustic monitoring of animal species, which allows for detailed study of animal vocalizations and behavior without intrusive methods. The technology has been successfully used in experiments monitoring bat echolocation beams and localizing songbirds within their habitat. The flexibility of the microphone array system allows for simultaneous tracking of multiple species, making it a valuable tool for studying complex behaviors of vocalizing animals.

COMMUNICATIONS BIOLOGY (2021)

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Article Computer Science, Hardware & Architecture

FIWARE based low-cost wireless acoustic sensor network for monitoring and classification of urban soundscape

Pau Arce et al.

Summary: This paper introduces a wireless acoustic sensor network based on Raspberry Pi devices for monitoring sound events in urban environments. The system is designed according to the open standard FIWARE, exhibiting high scalability. The sound classifier performs well, achieving similar accuracy compared to systems utilizing cloud computing.

COMPUTER NETWORKS (2021)

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Article Chemistry, Analytical

A Corpus-Based Evaluation of Beamforming Techniques and Phase-Based Frequency Masking

Caleb Rascon

Summary: Beamforming techniques are evaluated and compared in different acoustic environments, with a phase-based frequency masking beamformer showing superior performance. The evaluation corpus and beamforming implementations are freely available for experiment repeatability and transparency. Insights and tendencies observed from the evaluation results are also presented for informed decision-making.

SENSORS (2021)

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Proceedings Paper Automation & Control Systems