Punch J L, Montgomery A A, Schwartz D M, Walden B E, Prosek R A, Howard M T
J Acoust Soc Am. 1980 Aug;68(2):458-66. doi: 10.1121/1.384758.
Perceptual dimensions underlying similarity ratings and preference judgments of the quality of hearing-aid-processed speech were derived via multidimensional-scaling procedures, and were correlated with 15 indices of electroacustic performance to determine those electroacoustic characteristics contributing maximally to quality judgements. Connected discourse was tape recorded through 20 conventional hearing aids and presented in a paired-comparison paradigm to ten normal listeners for similarity ratings and quality preference judgments. Analysis of the group similarity matrices revealed only one definitive perceptual dimension, low-cutoff frequency, that was common to the listeners. In a three-dimensional INDSCAL solution, this electroacoustic factor correlated--0.87 with dimension 1. Listeners strongly preferred hearing aids with relatively low low-cutoff frequencies; dimension 1 correlated--0.76 with their preferences. The quality judgments of some listeners were found via KYST analysis to exhibit a multidimensional structure, with low-cutoff frequency remaining the most salient dimension. Secondary dimensions varied across these several listeners, and included response irregularity, equivalent input noise level, high-cutoff frequency, and intermodulation distortion. Thus, the data provided evidence that, while low-cutoff frequency dominates listener judgments a multidimensional model may underlie the perceptual strategies used by some listeners to form quality judgments of hearing-aid-processed speech.
通过多维标度程序得出了助听器处理语音质量的相似性评分和偏好判断所依据的感知维度，并将其与15个电声性能指标相关联，以确定对质量判断贡献最大的那些电声特性。通过20台传统助听器对连贯话语进行录音，并以配对比较的方式呈现给10名正常听力者进行相似性评分和质量偏好判断。对群体相似性矩阵的分析仅揭示了一个明确的感知维度，即低截止频率，这是所有听力者共有的。在三维INDSCAL解决方案中，这个电声因素与维度1的相关性为-0.87。听力者强烈偏好低截止频率相对较低的助听器；维度1与他们的偏好的相关性为-0.76。通过KYST分析发现，一些听力者的质量判断呈现出多维结构，低截止频率仍然是最突出的维度。这些听力者的次要维度各不相同，包括响应不规则性、等效输入噪声水平、高截止频率和互调失真。因此，数据表明，虽然低截止频率主导着听力者的判断，但多维模型可能是一些听力者用于形成对助听器处理语音质量判断的感知策略的基础。
