In the present study, speech intelligibility (SI) experiments were performed using simulated hearing loss (HL) sounds in laboratory and remote environments to clarify the effects of peripheral dysfunction. Noisy speech sounds were processed to simulate the average HL of 70- and 80-year-olds using Wadai Hearing Impairment Simulator (WHIS). These sounds were presented to normal hearing (NH) listeners whose cognitive function could be assumed to be normal. The results showed that the divergence was larger in the remote experiments than in the laboratory ones. However, the remote results could be equalized to the laboratory ones, mostly through data screening using the results of tone pip tests prepared on the experimental web page. In addition, a newly proposed objective intelligibility measure (OIM) called the Gammachirp Envelope Similarity Index (GESI) explained the psychometric functions in the laboratory and remote experiments fairly well. GESI has the potential to explain the SI of HI listeners by properly setting HL parameters.

翻译：本研究通过实验室与远程环境下的模拟听力损失（HL）声音实验，探讨外周功能障碍对言语清晰度（SI）的影响。实验采用和田听力损伤模拟器（WHIS）将含噪语音信号处理为70岁及80岁人群平均听力损失特征的模拟声音，并将这些刺激呈现给认知功能正常的正常听力（NH）受试者。结果显示，远程实验数据的离散程度显著高于实验室数据。然而，通过实验网页内置纯音短脉冲测试结果进行数据筛选后，远程实验数据基本可校准至实验室数据水平。此外，本研究提出一种新型客观可懂度度量（OIM）——伽马啁啾包络相似度指数（GESI），该指标能较准确地解释实验室及远程实验中的心理测量函数。通过合理设置听力损失参数，GESI具有解释听力受损（HI）受试者言语清晰度的潜力。