CMU LTI 11751 - An Acoustic Model of the Water Noise in the Dolphin Project (16 pages)

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An Acoustic Model of the Water Noise in the Dolphin Project



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An Acoustic Model of the Water Noise in the Dolphin Project

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Pages:
16
School:
Carnegie Mellon University
Course:
Lti 11751 - Speech Recognition and Understanding

Unformatted text preview:

Carnegie Mellon University Language Technology Institute An Acoustic Model of the Water Noise in the Dolphin Project 11 751 Speech Recognition and Understanding Fall 2004 Instructor Dr Tanja Schultz Kai min Kevin Chang Alex Kang Introduction Towards Communication with Dolphins is an ambitious long term scientific study of Tursiops Truncatus Atlantic Bottlenose Dolphin speech at Carnegie Mellon University Working with the Wild Dolphin Project a non profit all volunteer organization the two groups set out a goal to utilize speech recognition technology to better classify dolphin recordings Since the establishment of the Wild Dolphin Project in 1989 giga bytes of dolphin sound have been recorded but left untranscribed Manual transcription would consume hours of tedious routine work Thus in our term project for 11 751 Speech Recognition and Understanding we propose to train acoustic models for water noise with a goal of automatic classification of dolphin sound and water noise Literature survey Water noise modeling can be classified into two schools On one hand a noise detection model uses standard HMM to classify a series of sound units into noise and non noise On the other hand a noise filter model utilizes signal processing theories to separate noise and non noise into different channels Given that water noise is background noise that is often prevalent throughout the entire recordings a noise filter model is of ultimate interest However a noise filter model is an open question in signal processing and is beyond the scope of a term project For the purpose of automatic classification of dolphin sound and water noise a noise detection model suffices A typical recording in the Dolphin Project contains a range of dolphin sound and noises There are three types of dolphin sound namely broadband clicks used in echolocation broadband burst pulses and whistles The noises are more difficult to describe Depending on different recording equipment environment noises include human



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