Fryd Amanda S, Van Stan Jarrad H, Hillman Robert E, Mehta Daryush D
Communication Sciences and Disorders, MGH Institute of Health Professions, Charlestown, MACenter for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston.
Communication Sciences and Disorders, MGH Institute of Health Professions, Charlestown, MACenter for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonDepartment of Surgery, Harvard Medical School, Boston, MASurgery & Health Sciences and Technology, Harvard Medical School, Boston, MA.
J Speech Lang Hear Res. 2016 Dec 1;59(6):1335-1345. doi: 10.1044/2016_JSLHR-S-15-0430.
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 (Psg') 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 Psg' and SPL.
The coefficient of determination between accelerometer level and Psg' was high when data were pooled from all vowel and pitch contexts for each participant (r2 = .68-.93). These relationships were stronger than corresponding relationships between accelerometer level and SPL (r2 = .46-.81). The average 95% prediction interval for estimating Psg' using accelerometer level was ±2.53 cm H2O, ranging from ±1.70 to ±3.74 cm H2O across participants.
Accelerometer signal amplitude correlated more strongly with Psg' than with SPL. Future work is warranted to investigate the robustness of the relationship in nonmodal voice qualities, individuals with voice disorders, and accelerometer-based ambulatory monitoring of subglottal pressure.
本研究的目的是评估使用颈部表面加速度计估计声门下气压的潜力，并比较预测声门下气压相对于预测声压级（SPL）的准确性。
在10名嗓音健康的受试者以三种音高在模态发声范围内对三种不同的/p/元音组合（/pa/、/pi/、/pu/）从大声到轻声重复发声时，获取声门下压力（Psg'）的间接估计值。记录口腔内气压、颈部表面加速度和辐射声压，并将加速度信号的均方根振幅与Psg'和SPL进行相关性分析。
当汇总每个受试者所有元音和音高情况下的数据时，加速度计水平与Psg'之间的决定系数较高（r2 = 0.68 - 0.93）。这些关系比加速度计水平与SPL之间的相应关系更强（r2 = 0.46 - 0.81）。使用加速度计水平估计Psg'的平均95%预测区间为±2.53 cm H2O，不同受试者之间的范围为±1.70至±3.74 cm H2O。
加速度计信号振幅与Psg'的相关性比与SPL的相关性更强。未来有必要开展工作，研究在非模态嗓音质量、嗓音障碍个体以及基于加速度计的声门下压力动态监测中这种关系的稳健性。
