Title :
Autocorrelation method for time delay estimation to calculate the source level of click signal for Sousa Chinensis
Author :
Liangliang Yang ; Xingbin Tu ; Qiming Wang ; Zhaotong Zhu ; Xiaomei Xu
Author_Institution :
MOE Key Lab. of Underwater Acoust. Commun. & Marine Inf. Technol., Xiamen Univ., Xiamen, China
Abstract :
Like other dolphins, Sousa Chinensis produces click signals to echolocate in underwater. Research on the source level (SL) of click signal transmitted by Sousa Chinensis is beneficial to understand the survival and behavior of such animals. In the shallow sea where the Sousa Chinensis lives, the underwater environment is so complex that causes the click signals propagation to the receiving hydrophone at different times in different paths. In this paper, we introduced autocorrelation signal process analysis to calculate the delay time, predicted the source level base on the oretical sound wave attenuation rule in the sea. During May of 2013, the Click signals were recorded by a set of hydrophone system in shallow sea of Xiamen in China. The results show that the SL of Sousa Chinensis ranges from 166.9 to 199.6 dB peak to peak (p-p) re: 1μPa, and mean value is 180.05±8.93dB.
Keywords :
acoustic signal processing; bioacoustics; delay estimation; hydrophones; mechanoception; underwater acoustic propagation; Sousa chinensis; autocorrelation method; autocorrelation signal process analysis; click signal transmission; click signals propagation; dolphins; hydrophone system; oretical sound wave attenuation rule; shallow sea; source level calculation; time delay estimation; underwater echolocation; underwater environment; Correlation; Delay effects; Delays; Dolphins; Reflection; Sea surface; Sonar equipment; Sousa Chinensis; autocorrelation analysis; source level; time delay estimation;
Conference_Titel :
OCEANS 2014 - TAIPEI
Conference_Location :
Taipei
Print_ISBN :
978-1-4799-3645-8
DOI :
10.1109/OCEANS-TAIPEI.2014.6964310
