RUI: Dynamic Interaction of Pitch and Loudness

在一个自然的听音环境中，很多声音的音高和响度的变化都呈现出正相关关系。 声音越大，音调越高。 令人惊讶的是，以前大多数关于音高和响度感知的研究都是使用频率和强度都保持不变的静态音调。 这已经产生了音高和响度感知的静态结构模型，其可能不能准确地反映自然收听环境中的音高和响度感知。 最近的研究表明，在动态条件下，音高和响度的相互作用的方式是相反的，这些静态模型预测。 目前的项目阐述了一个理论框架，其中提出，音高和响度的动态感知相互作用已经演变为在自然听觉环境中发生的频率和强度变化之间的相关性。 在不同的实验条件下，听众将与频率和振幅调制的声音，并在各种心理物理学实验作出知觉判断的积极和消极相关的变化频率和强度。 这些发现将为动态音高和响度的相互作用提供一个基于经验的理论解释，并提供一些关于调节神经机制位置的初步信息。这项工作对听力受损者、交流、听觉显示和盲人的感觉替代系统具有潜在的意义。

In a natural listening environment many sounds exhibit a positivecorrelation between changes in pitch and loudness. As sounds get louder,they tend to get higher in pitch. Surprisingly, most previous research onpitch and loudness perception has used static tones that remain constant inboth frequency and intensity. This has yielded static structural models ofpitch and loudness perception that may not accurately reflect the perceptionof pitch and loudness in a natural listening environment. Recent work hasshown that under dynamic conditions, pitch and loudness interact in a waythat is opposite that predicted by these static models. The current projectsets forth a theoretical framework in which it is proposed that the dynamicperceptual interaction of pitch and loudness has evolved to take advantageof the correlation between frequency and intensity change that occurs in anatural listening environment. Under various experimental conditions,listeners will be presented with frequency- and amplitude-modulated sounds,and in a variety of psychophysical experiments make perceptual judgmentsabout positively and negatively correlated changes in frequency andintensity. The findings will provide an empirically based, theoreticalaccount of dynamic pitch and loudness interaction, and provide somepreliminary information about the location of the mediating neuralmechanisms. The work has potential implications for the hearing impaired,communications, auditory display, and sensory substitution systems for theblind.