No Musician Advantage in the Perception of Degraded-Fundamental Frequency Speech in Noisy Environments.

PURPOSE: Pitch variations of the fundamental frequency ( f o ) contour contribute to speech perception in noisy environments, but whether musicians confer an advantage in speech in noise (SIN) with altered f o information remains unclear. This study investigated the effects of different levels of degraded f o contour (i.e., conveying lexical tone or intonation information) on musician advantage in speech-in-noise perception.

METHOD: A cohort of native Mandarin Chinese speakers, comprising 30 trained musicians and 30 nonmusicians, were tested on the intelligibility of Mandarin Chinese sentences with natural, flattened-tone, flattened-intonation, and flattened-all f o contours embedded in background noise masked under three signal-to-noise ratios (0, -5, and -9 dB). Pitch difference thresholds and innate musical skills associated with speech-in-noise benefits were also assessed.

RESULTS: Speech intelligibility score improved with increasing signal-to-noise level for both musicians and nonmusicians. However, no musician advantage was observed for identifying any type of flattened- f o contour SIN. Musicians exhibited smaller f o pitch discrimination limens than nonmusicians, which correlated with benefits for perceiving speech with intact tone-level f o information. Regardless of musician status, performance on the pitch and accent musical-skill subtests correlated with speech intelligibility score.

CONCLUSIONS: Collectively, these results provide no evidence for a musician advantage for perceiving speech with distorted f o information in noisy environments. Results further show that perceptual musical skills on pitch and accent processing may benefit the perception of SIN, independent of formal musical training. Our findings suggest that the potential application of music training in speech perception in noisy backgrounds is not contingent on the ability to process f o pitch contours, at least for Mandarin Chinese speakers.

SUPPLEMENTAL MATERIAL: https://doi.org/10.23641/asha.23706354.