Bryde’s Whale

Methods

Audio files were decimated using Triton vXXX (Matlab, cite) at 10x and and 100x, giving 4800 Hz and 480 Hz decimated sample rate, respectively. Data were reviewed at both of these decimation rates for DIFAR buoys, and an additional review at full bandwidth (48 kHz) was conducted for omni directional recordings from sonobuoy types 57.

Mid-Frequency Review

Recordings decimated to 4800 Hz were reviewed using RavenPro Software (v1.6.4). Page size = 60 seconds, 90% increment, 10% step increment. View only spectrogram (not waveform), 2 rows with 512 FFT with 200 Hz to 2400 Hz in window.

For each recording, the Start and End of the monitoring/review were noted (including end/restart due to any noise that reduces ability to detect calls of interest).