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The purpose of this study was to evaluate the potential for estimating subglottal air pressure using a neck-surface accelerometer and to compare the accuracy of predicting subglottal air pressure relative to predicting acoustic sound pressure level (SPL).

Indirect estimates of subglottal pressure (P_sg′) were obtained from 10 vocally healthy speakers during loud-to-soft repetitions of 3 different /p/–vowel gestures (/pa/, /pi/, /pu/) at 3 pitch levels in the modal register. Intraoral air pressure, neck-surface acceleration, and radiated acoustic pressure were recorded, and the root-mean-square amplitude of the acceleration signal was correlated with P_sg′ and SPL.

The coefficient of determination between accelerometer level and P_sg′ was high when data were pooled from all vowel and pitch contexts for each participant (r ² = .68–.93). These relationships were stronger than corresponding …