Relationships Between Vocal Function Measures Derived from an Acoustic Microphone and a Subglottal Neck-surface Accelerometer

Overview

Journal IEEE/ACM Trans Audio Speech Lang Process

Date 2016 Apr 12

PMID 27066520

Citations 32

Authors

Daryush D Mehta

Jarrad H Van Stan

Robert E Hillman

Affiliations

Soon will be listed here.

Abstract

Monitoring subglottal neck-surface acceleration has received renewed attention due to the ability of low-profile accelerometers to confidentially and noninvasively track properties related to normal and disordered voice characteristics and behavior. This study investigated the ability of subglottal neck-surface acceleration to yield vocal function measures traditionally derived from the acoustic voice signal and help guide the development of clinically functional accelerometer-based measures from a physiological perspective. Results are reported for 82 adult speakers with voice disorders and 52 adult speakers with normal voices who produced the sustained vowels /a/, /i/, and /u/ at a comfortable pitch and loudness during the simultaneous recording of radiated acoustic pressure and subglottal neck-surface acceleration. As expected, timing-related measures of jitter exhibited the strongest correlation between acoustic and neck-surface acceleration waveforms ( ≤ 0.99), whereas amplitude-based measures of shimmer correlated less strongly ( ≤ 0.74). Additionally, weaker correlations were exhibited by spectral measures of harmonics-to-noise ratio ( ≤ 0.69) and tilt ( ≤ 0.57), whereas the cepstral peak prominence correlated more strongly ( ≤ 0.90). These empirical relationships provide evidence to support the use of accelerometers as effective complements to acoustic recordings in the assessment and monitoring of vocal function in the laboratory, clinic, and during an individual's daily activities.

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