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| Main Authors: | , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Sensors (Basel, Switzerland)
2025
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| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41374681/ |
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Table of Contents:
- A Low-Cost Passive Acoustic Toolkit for Underwater Recordings. Galanos, Vassilis Trygonis, Vasilis Mazaris, Antonios D Katsanevakis, Stelios Passive acoustic monitoring is a key tool for studying underwater soundscapes and assessing anthropogenic impacts, yet the high cost of hydrophones limits large-scale deployment and citizen science participation. We present the design, construction, and field evaluation of a low-cost hydrophone unit integrated into an acoustic toolkit. The hydrophone, built from off-the-shelf components at a cost of ~20 €, was paired with a commercially available handheld recorder, resulting in a complete system priced at ~50 €. Four field experiments in Greek coastal waters validated hydrophone performance across a marine-protected area, commercial port, aquaculture site, and coastal reef. Recordings were compared with those from a calibrated scientific hydrophone (SNAP, Loggerhead Instruments). Results showed that the low-cost hydrophones were mechanically robust and consistently detected most anthropogenic sounds also identified by the reference instrument, though their performance was poor at low frequencies (