NDLI: Ambient Noise Classification in the Gulf of Mexico

Content Provider	IEEE Xplore Digital Library
Author	Snyder, M.A. Orlin, P.A.
Copyright Year	2007
Description	Author affiliation: Naval Oceanogr. Office, Stennis Space Center (Snyder, M.A.; Orlin, P.A.)
Abstract	Long-term omni-directional ambient noise was collected in the Gulf of Mexico during 2004 and 2005. The data were recorded continuously and have a bandwidth of 10-1000 Hz. Two-minute averages of Short Time Fourier Transforms (STFT) of the data were computed. The processed data contain wind and wave noise, distant shipping, nearby shipping and storm passage noise with amplitude variation spanning multiple time scales. These contributions to the overall noise level are additive in producing the total measured noise level at any time. An heuristic scheme based on determining the local mean noise level over a period of several hours is used to determine the positive and negative peak values of the data relative to the local mean. The statistics of the negative peaks are used to eliminate large positive peaks (outliers) resulting from nearby shipping. The final local mean is used to characterize long period processes resulting from frontal passages or storms. The removed peak data are used to characterize shipping, and the data with the peaks removed are used to characterize long period ambient noise from wind, waves and precipitation about the local mean. The results of the analysis of the data from January 2005 will be presented.
Starting Page	1
Ending Page	10
File Size	5241342
Page Count	10
File Format	PDF
ISBN	9780933957350
DOI	10.1109/OCEANS.2007.4449320
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-29
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Noise level Frequency Storms Sea measurements Noise measurement Wind speed Marine vehicles Background noise Acoustic noise Time measurement
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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