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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody

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Psychometric properties associated with perceived vocal roughness using a matching task.

David A Eddins¹, Rahul Shrivastav

¹Department of Communication Sciences and Disorders, Global Center for Hearing and Speech Research, University of South Florida, 4202 East Fowler Avenue, PCD 1017, Tampa, Florida 33620 deddins@usf.edu.

The Journal of the Acoustical Society of America

|October 15, 2013

Summary

This summary is machine-generated.

This study identified an optimal sound stimulus for measuring vocal roughness in laboratory settings. A specific complex sound effectively brackets perceived vocal roughness, aiding in voice quality assessment.

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Area of Science:

Acoustics
Speech Science
Psychophysics

Background:

Quantifying voice quality requires precise laboratory methods.
Vocal roughness is a key perceptual attribute of voice quality.

Purpose of the Study:

To determine the best comparison stimulus for bracketing vocal roughness.
To develop a general method for estimating vocal roughness.

Main Methods:

A psychophysical matching paradigm was employed.
Two candidate comparison stimuli were evaluated.
Psychometric functions were used to analyze roughness matching.

Main Results:

A speech-like sawtooth-plus-noise complex (20 dB SNR) was found effective.
Amplitude modulation by a sinusoidal function raised to the 4th power created a suitable stimulus.
This stimulus provided a broad perceptual dynamic range for roughness matching.

Conclusions:

The selected complex sound stimulus is well-suited for vocal roughness measurement.
This method enhances the laboratory quantification of voice quality.