Echolocation Signal Detection From Captive Dolphin Using Whistles Sound

Abstract

There is little information about the detection of signals made on dolphins by detecting whistle sounds that serve as an echolocation on dolphins. Bottlenose dolphins (Tursiops aduncus) will be able to receive sound waves with a frequency range of 15 kHz to 150 kHz. The purpose of this research was to analyze the signal detection of whistle sound aimed at communication manipulation. This research is done with the location at Ocean Dream Ocean, Ancol. Indonesia on May 10, 2016. The method of the filter in this study using Band Pass Filter (BPF) with cut off 0–12 kHz. The results of signal detection on dolphin whistle Interval Interval at the time before meals and after meals have the different maximum time span of each other with time 630 ms and 650 ms. At the whistle sound interval after meals more shows a significantly greater difference with whistle 2 at 196.66 ms duration and before meals with whistle 4 at 12 ms duration. Source level (SL) produced at the time before the meal has the highest value on whistle sound 3 (range 15900 Hz-16100 Hz) at 33.6 dB intensity, while at the after the meal on whistle sound 4 (range 17800 Hz - 185 00 Hz on intensity 33.62 dB.