Algal Reef Soundscape

Underwater soundscapes of algal reefs at Taoyuan, Taiwan.

Acoustic Recorders. SoundTrap 300STD recorders were used to collect underwater recordings. Two SoundTrap recorders were used in three surveys: SoundTrap 300STD #1 SN1208004643; SoundTrap 300STD #2 SN805347354.

Configuration of Audio Recording. (1) Duration: 5 min. (2) Sampling Rate: 96kHz. (3) Channels: 1. (4) File Format: WAV (converted by SUD). (5) Audio Gain: High. (6) High Pass Filter: Off.

Field Deployment. Each SoundTrap recorder was fixed vertically on an angle steel at the bottom. The recorder was exposed in the air during low tide, so the collection of underwater recordings were only possible 3 hours before and after the high water.

Data Processing. We used the LTSA_gui (https://github.com/schonkopf/long-term-spectrogram) to visualize the spectral-temporal change of long-duration recordings. By the median-based long-term spectrogram, we employed the periodicity-coded non-negative matrix factorization (https://github.com/schonkopf/soundscape-viewer) to separate the audio data into two components: (1) high-frequency biological chorus, and (2) low-frequency ambient noise. The relative intensities of the two components were analyzed.

Data and Resources

Tags

Wikidata Keywords

  • Q1358257

Basic Information

Data Type Scientific and statistical data formats

Spatio-temporal Information

Temporal Resolution Daily
Start Time 2018-05-17
Spatial Coverage show more
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X.min 121.00118637084961
X.max 121.07500076293947
Y.min 24.989772812172564
Y.max 25.050749340454743

Management Information

Author Tzu-Hao Lin
Created Time 2019-03-25
Contact Person Tzu-Hao Lin
Contact Person Email schonkopf@gmail.com