Dolphins Underwater Sounds Database

The present database contains records of underwater sounds produced by dolphins of the species Tursiops Truncatos. The dolphins live in Dolphinarium Varna (Varna, Bulgaria) and are a family of five individuals. The records was made in the autumn 2019 by the “SigNautic Lab” crew, using measurement equipment of the world’s leading suppliers Bruel&Kjaer and National Instruments. The database contains two sets of .wav audio lossless uncompressed files – 13 “bursts” and 104 “clicks” with durations of 250 ms to 9 s. All signals are sampled at 250 kHz and are amplitude-normalized. Each signal is accompanied with results from time-frequency and statistical analysis – oscillogram, frequency spectrum, spectrogram, cepstrogram, correlogram, histogram. The database includes also another 130 unanalyzed .wav audio segments with duration in the range of 250 ms to 4 s and 6 raw unsegmented 5 min .wav audio records. Matlab-based signal analysis software is also provided in the pack in order to facilitate the reproducing of the results and to make possible eventual further analysis. The software uses “Matlab Signal Processing Toolbox” and “Matlab Statistics and Machine Learning Toolbox”. The authors of the database gratefully thank to the company “Festa Dolphinarium Varna” Ltd., without whose support our research study would not have been possible.