tailieunhanh - Báo cáo hóa học: " Analysis and Modeling of Echolocation Signals Emitted by Mediterranean Bottlenose Dolphins"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Analysis and Modeling of Echolocation Signals Emitted by Mediterranean Bottlenose Dolphins | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 25257 Pages 1-10 DOI ASP 2006 25257 Analysis and Modeling of Echolocation Signals Emitted by Mediterranean Bottlenose Dolphins Maria Greco and Fulvio Gini Dipartimento di Ingegneria dell Informazione Elettronica Informatica Telecomunicazioni Universita di Pisa via G. Caruso 16 56122 Pisa Italy Received 21 January 2005 Revised 31 May 2005 Accepted 22 August 2005 Recommended for Publication by Jacques Verly We analyzed the echolocation sounds emitted by Mediterranean bottlenose dolphins. We extracted the click trains by visual inspection of the data files recorded along the coast of the Tuscany with the collaboration of the CETUS Research Center. We modeled the extracted sonar clicks as Gaussian or exponential multicomponent signals we estimated the characteristic parameters and compared the data with the reconstructed signals based on the estimates. Results about the estimation and the data fitting are largely shown in the paper. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION Dolphins have a rich vocal repertoire that has been categorized into three classes i broadband short-duration clicks called sonar clicks used in echolocation for orientation perception and navigation ii wideband pulsed sounds called burst pulses used in social contexts iii narrowband frequency-modulated whistles also used in social contexts. This work is devoted to the analysis and modeling of echolocation signals emitted by the tursiops truncatus bottlenose dolphin living in the Tuscany Archipelago Park in both audio and ultrasonic bands. Dolphins use a range of frequencies extending from 1 to 150 KHz. Communication signals burst pulses and whistles have a range of frequencies from 1 to 25 KHz. Generally sonar signals have a range of frequencies from 25 to 150 KHz. Dolphins can emit at the same time and independently sounds of various natures. .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.