[논문모음]음향 측정 특성과 청감 특성의 관계

The relationship between acoustical and perceptual measures of vocal effort

 

Excessive vocal effort is a common clinical voice symptom, yet the acoustical manifestation of vocal effort and how that is perceived by speakers and listeners has not been fully elucidated. Here, 26 vocally healthy adults increased vocal effort during the production of the utterance /ifi/, followed by self-ratings of effort on a 100 mm visual analog scale. Twenty inexperienced listeners assessed the speakers’ vocal effort using the visual sort-and-rate method. Previously proposed acoustical correlates of vocal effort were calculated, including: mean sound pressure level (SPL), mean fundamental frequency (fo), relative fundamental frequency (RFF) offset cycle 10 and onset cycle 1, harmonics-to-noise ratio (HNR), cepstral peak prominence and its standard deviation (SD), and low-to-high (L/H) spectral ratio and its SD. Two separate mixed-effects regression models yielded mean SPL, L/H ratio, and HNR as significant predictors of both speaker and listener ratings of vocal effort. RFF offset cycle 10 and mean fo were significant predictors of listener ratings only. Therefore, speakers and listeners attended to similar acoustical cues when making judgments of vocal effort, but listeners also used additional time-based information. Further work is needed to determine how vocal effort manifests in the speech signal in speakers with voice disorders

 

 

 

Correlation Between Auditory-Perceptual Parameters and Acoustic Characteristics of Voice in Theater Actors

 

Abstract Background: Theater actors are a subgroup of professional voice users who may present their performances at a high-pressure vocal demand, like loud talking, shouting, or even stage singing. Disturbances in auditory-perceptual or acoustic parameters of voice are commonly experienced by theater actors and are known as a frequent occupational hazard for them. Objectives: This study aimed to examine the relationship between auditory-perceptual and acoustic parameters of the voice in Iranian theater actors. Methods: This descriptive-analytical study was conducted on 45 Iranian theater actors, including 22 females and 23 males, with a mean age of 30.76 ± 7 years. The auditory-perceptual evaluation was performed using the Persian version of the Consensus AuditoryPerceptual Evaluation of Voice (CAPE-V). Acoustic characteristics, including mean fundamental frequency (F0), local shimmer, local jitter, and harmonic-to-noise ratio (HNR), were extracted from the subjects’ “speech sample.” Correlation analyses were performed to examine the relationship between the measures of auditory-perceptual and acoustic voice characteristics. Results: The overall auditory-perceptual severity was negatively correlated with mean F0 (r = -0.592, P < 0.05) and HNR (r = - 0.324, P < 0.05). Roughness was also negatively correlated with voice mean F0 (r = -0.629, P < 0.05) and HNR (r = -0.322, P < 0.05) and positively correlated with voice local jitter (r = 0.310, P < 0.05). We also found that pitch was negatively correlated with voice mean F0 (r = -0.309, P < 0.05) and positively correlated with voice local jitter (r = 0.292, P = 0.050). Conclusions: Acoustic measures, including F0, HNR, and jitter, correlate with auditory perceptual parameters of the voice quality in Iranian theater actors. These findings highlight the significance of acoustic parameters in assessing voice quality in professional voice users such as theater actors. Keywords: Professional Voice User, Voice, Theater Actor, Acoustic Voice Characteristics, Voice Quality, Auditory-Perceptual Evaluation