Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
J Acoust Soc Am. 2010 Feb;127(2):823-8. doi: 10.1121/1.3278605.
Spatial impression is an important acoustic quality of concert halls. An accepted objective measure for spatial impression is the interaural cross-correlation (IACC) coefficient. Recently, spherical microphone arrays have been studied for room acoustics analysis and music recordings. This study presents a theoretical formulation for the computation of IACC using spherical-harmonics representations of the sound field, as measured by spherical microphone arrays, and spherical-harmonics representation of head-related transfer functions (HRTFs), taken from HRTF databases. As spherical microphone arrays typically use a finite number of microphones, they may not be able to capture the complete spatial information in a sound field. Therefore, the effect of limited spherical-harmonics order on the accuracy of IACC approximation using the proposed method is studied using simulated and measured data. The method presented in this paper can be further used to study the effect of limited spatial information on the spatial perception of sound fields.
空间印象是音乐厅的一个重要音质特性。空间印象的一个公认的客观度量是互相关系数（IACC）。最近，球形麦克风阵列已经被研究用于房间声学分析和音乐录音。本研究提出了一种使用球形麦克风阵列测量的声场的球谐函数表示以及从 HRTF 数据库获取的头相关传递函数（HRTF）的球谐函数表示来计算 IACC 的理论公式。由于球形麦克风阵列通常使用有限数量的麦克风，它们可能无法捕获声场中的完整空间信息。因此，使用所提出的方法，研究了有限的球谐阶数对 IACC 逼近精度的影响，使用了模拟和测量数据。本文提出的方法可以进一步用于研究有限的空间信息对声场的空间感知的影响。
