Whistle sound is a voice that is intended to echolocation, whistle sound is a major role in internal and inter-group communication. The objective research is to know the power spectral patterns and fluctuations in sound based on frequency of the sounds produced by dolphins and observing the position of dolphins. Noisy Time Domain (NTD) and behaviour using the underwater camera, and also comparing between time and sound spectrum. Data recording was taken at the Safari Park of Cisarua Bogor in Indonesia, by taking data in show pool. The results showed that salinity before feeding time in the show pool with replication 1,2, and 3 has salinity value that is equal to 30 ‰. Data at the show pool before feeding with replications 1,2, and 3 has a salinity of 29 ‰. Sound whistle 3 before feeding time of 28.03 dB with the frequency interval of 14 642 Hz-16000 Hz. F-test at the show pool before meals has heterogeneous value. Treat before meals at the show pool has a value of P <0.001 and P <0.001. Value Noisy Time Domain have differences with each other and have a lot of different sound patterns. In general, there are real differences are evidenced by F test on a range of time at each whistle on show pool in the time before meals. In general, there is a noticeable difference in the range of time at each whistle on show pool in the time before meals. The behaviour of dolphins have a habit that has the movement toward the surface of the pool and movement and position will be influenced frequency and intensity value.

/pdf/whistle-sound-detection-and-behaviour-of-male-dolphin-bottle-3vzcz8s67b.pdf

Whistle sound detection and behaviour of male dolphin bottle nose (Tursiops aduncus) using noisy time domain modelling in captivity

Dolphins belong to the Cetacean Order and are members of the Odontocetes with physical characteristics and the sound signals they emit. This fish lives in the sea and is one of the rare animals. The preparation of this scientific article was carried out in May 2021 using a descriptive analysis based on a literature review using secondary data as a source of information. The sound frequency range with the highest intensity value is 32 dB in the frequency range of 14 - 16 kHz.

Case Study of Sound Production and Dolphin Behavior in Waters

Produksi suara merupakan bagian dari metode bioakustik, yaitu menggabungkan biologi dan akustik yang biasanya merujuk pada penelitian mengenai produksi suara, dispersi melalui media elastis, dan penerimaan pada hewan, termasuk manusia. Penelitian ini mengamati tingkah laku lumba-lumba jantan dengan melakukan pendekatan ilmu bioakustik yang melihat karakteristik dari lumba-lumba tersebut. Lumba-lumba jantan (Tursiops aduncus) yang dipelihara di Taman Safari Indonesia, Cisarua Bogor memiliki nilai intensitas terendah sebesar 28,03 dB dan tertinggi adalah sebesar 32,01 dB. Dengan ratarata parameter yang terukur yaitu salinitas sebesar 30 ‰ dan suhu 23 °C dengan kedalaman kolam 4,5 meter. Range frekuensi suara klik dengan nilai intensitas tertinggi yaitu sebesar 32 dB dengan suara klik sesudah makan pada hari ke 2 yang terdapat pada range frekuensi yaitu 14 - 16 kHz. Range frekuensi suara klik lumba-lumba jantan hidung botol (Tursiops aduncus) di Taman Safari, Cisarua Bogor, Indonesia yaitu pada frekuensi 14,2- 15 kHz.

/pdf/produksi-suara-dan-tingkah-laku-lumba-lumba-jantan-hidung-4k7z9ghz4v.pdf

PRODUKSI SUARA DAN TINGKAH LAKU LUMBA-LUMBA JANTAN HIDUNG BOTOL (Tursiops aduncus ) DENGAN METODE BIOAKUSTIK DI TAMAN SAFARI, CISARUA BOGOR, INDONESIA

This study discussed about Haar wavelet with a view original signal, denoised signal, and residual signal with using fourth whistle sounds of dolphin ( Tursiops aduncus ). The study was conducted in Safari Park, Cisarua, Bogor Indonesia with 2 dolphins. The results showed differences in results Haar wavelet, this study proves that the Haar wavelet is suitable for the analysis of dolphin sounds, and its have frequency ranged 8-22 kHz. The highest value of the noised signal was smaller than residual signal. The highest of residual signal contained in the second whistle, while the lowest was whistle 1, it showed that the larger the signal denoised result residual signal generated using Haar wavelet. The frequency of source level value ranged 8500 Hz to 11800 Hz, with the highest SL value was 43.9 dB (brown cyrcle). The lowest of the frequency of Source Level (SL) value ranged between 15700 Hz to 17990 Hz, with the lowest SL value was 38.5 dB (brown cyrcle). Whistle 1, 2, 3, and 4 have a different value SL and every SL values obtained in 1,2,3, and 4 have differences noise, it shows the same target but SL value and the sound patterns remain distinct by looking at time duration of whistle sound. Beam pattern from an omni directional sound source (DI= 0 dB, cyan trace) and a directional source following the piston model (DI= 18 dB, black  trace) and beam pattern with 4 types signal have ranged value 70 o-180°, with highest intensity value was 60o.

/pdf/spectral-analysis-using-haar-wavelet-original-signal-22er7iqlxt.pdf

Spectral analysis using Haar wavelet (original signal, denoised signal, residual signal) and source level (SL) for whistle sound of dolphin (Tursiops aduncus) in captivity

Signal and spectrum analysis signature whistle of bottlenose dolphins using Wavelab, and Raven Pro 1.5 software. Analysis spectrum of bottlenose dolphin with software analysis Raven Pro 1.5 with wave data channels 1 with sample rates is 44100 Hz, encoding data 16-bit signed, length time duration is 0,7 second, and samples of data is 32386 and have 6 pattern of signature whistle bottlenose dolphins. Analysis of power spectral density used Power Spectral Density (PSD) Yule-Walker AR and Welch Power Spectral Density of signature whistles with location of research in safari park captivity, Indonesia. The pattern seen in the sound has six patterns of range is at 100-700 ms with frequency 6-22 kHz. Interval of whistle have range in pattern 1 is 100-200 ms, pattern 2 is 200-300 ms, pattern 3 is 320-370 ms, pattern 4 is 430-550 ms, pattern 5 is 550-600 and pattern 6 is 600-650 ms. Range intensity color -47 until -48 dB, range frequency 1-8 kHz, time duration 0-500 ms. Highest intensity value of signature whistle bottlenose dolphins (Tursiops aduncus) is -37.71 dB in frequency 18 kHz with time duration 100 ms. Yule-Walker AR methos have result in marker 1 (perpendicular line) with clay color have (x) 2728 and (y) -15.70 dB, and marker 2 with interrupted line have (x) value 5456 and (y) value -5.55 dB. Welch method have result in marker 1 (perpendicular line) with clay color have (x) 1365 and (y) -32,67 dB, and marker 2 with interrupted line have (x) value 2728 and (y) value -32.46 dB Welch power spectral density is a good method used for signal and spectrum analysis with object signature whistle of bottlenose dolphins.

Spectrum Analysis Signature Whistle of Bottlenose Dolphins (Tursiops aduncus)at Captive, Indonesia with Yule-Walker AR and Welch Power Spectral DensityMethod

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PRODUKSI SUARA DAN TINGKAH LAKU LUMBA-LUMBA JANTAN HIDUNG BOTOL (Tursiops aduncus ) DENGAN METODE BIOAKUSTIK DI TAMAN SAFARI, CISARUA BOGOR, INDONESIA

Spectral analysis using Haar wavelet (original signal, denoised signal, residual signal) and source level (SL) for whistle sound of dolphin (Tursiops aduncus) in captivity

Spectrum Analysis Signature Whistle of Bottlenose Dolphins (Tursiops aduncus)at Captive, Indonesia with Yule-Walker AR and Welch Power Spectral DensityMethod