NDLI: A Unified Method of Broadband Acoustic Characterization for Fish Schools, Channels, and Range-Extended Targets

Content Provider	IEEE Xplore Digital Library
Author	Altes, R. Faust, W.
Copyright Year	1979
Description	Author affiliation: ORINCON Corporation, La Jolla, California, USA (Altes, R.)
Abstract	Fish schools and long-range propagation channels can be described by a scattering function, i.e., by the expected distribution of Doppler shifts and delays that are introduced by a collection of moving point scatterers. Acoustic inhomogeneities such as man-made objects and minerals on or below the ocean floor can be characterized by the frequency dependence of sound absorption and reflectivity, and by the positions of highlights, or rapid changes in acoustic impedance. Highlight structure and frequency dependence can be obtained from the time-frequency energy density function of the target impulse response. Both the scattering function and the time-frequency energy density function can be represented by the spectrogram of an echo. Spectrogram analysis therefore provides a unified framework for echo analysis. Experimental results are given in order to illustrate the use of spectrograms for detection and maximum likelihood echo classification. Pattern recognition techniques are used to determine the features of the echo spectrogram that are most important to a classifier.
Starting Page	92
Ending Page	99
File Size	606075
Page Count	8
File Format	PDF
DOI	10.1109/OCEANS.1979.1151331
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1979-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic scattering Time frequency analysis Density functional theory Marine animals Acoustic measurements Pattern recognition Educational institutions Optical scattering Radar scattering Reflectivity
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
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Lidar detection of fish schools

A broadband echo ranging system for measuring the frequency characteristics of fish schools

Consideration on acoustic scattering by individual fish schools

Theoretical analysis of fish food density

Study on underwater acoustic simulation measurement of radar HRRP for ship targets

A broadband echosounder for resonance classification of swimbladder-bearing fish

Classification of fish schools based on acoustic features associated with tilt angle

Three dimensional average target strength of fish by spheroid model

Digital Sonar System And Signal Processor

A Unified Method of Broadband Acoustic Characterization for Fish Schools, Channels, and Range-Extended Targets

Similar Documents

Lidar detection of fish schools

A broadband echo ranging system for measuring the frequency characteristics of fish schools

Consideration on acoustic scattering by individual fish schools

Theoretical analysis of fish food density

Study on underwater acoustic simulation measurement of radar HRRP for ship targets

A broadband echosounder for resonance classification of swimbladder-bearing fish

Classification of fish schools based on acoustic features associated with tilt angle

Three dimensional average target strength of fish by spheroid model

Digital Sonar System And Signal Processor

A Unified Method of Broadband Acoustic Characterization for Fish Schools, Channels, and Range-Extended Targets