Event detection of underwater acoustic data from MACHO hydrophone

Author

Yin-Ying Fang ; Meng-Chu Liu ; Shih-En Chou ; Chifang Chen ; Chien-Kang Huang

Author_Institution

Dept. of Eng. Sci. & Ocean Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2013

fDate

5-8 March 2013

Firstpage

1

Lastpage

6

Abstract

This paper presents an automated event detector of long time series of hydrophone data from Marine Cable Hosted Observatory (MACHO) system installed by the Central Weather Bureau in the offshore region of Taiwan´s northeast coast. The detector includes time-varying ambient noise level estimation via SEL (Sound Exposure Level per second) and Leq (equivalent continuous sound level, averaged over 30 seconds), and an energy detector with the estimated ambient noise level as threshold. A user friendly UI (user interface) is written to enhance the utilization. A full year of data are analyzed with the detector, and the results are satisfactory in the robustness the detection rate and the efficiency of analysis of large amount of data.

Keywords

acoustic noise measurement; hydrophones; underwater sound; Leq; MACHO hydrophone; SEL; Taiwan northeast coast; equivalent continuous sound level; event detection; marine cable hosted observatory system; sound exposure level per second; time-varying ambient noise level estimation; underwater acoustic data; Detectors; Noise; Ocean temperature; Parallel processing; Sonar equipment; Spectrogram; Time-frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Underwater Technology Symposium (UT), 2013 IEEE International

Conference_Location

Tokyo

Print_ISBN

978-1-4673-5948-1

Type

conf

DOI

10.1109/UT.2013.6519887

Filename

6519887