A simple method of calculating IACC and its utilization for measurement in a concert hall.

Abstract

Cross-correlation values using a dummy head for 1/1 octave bandpass noise (125 Hz–8 kHz) and for each single sound direction were measured. Summing up the measured values with the weighting of the sound energy spectrum of a source signal, the interaural cross-correlation function (IACC) for the stational noise and nonstational music as well as speech is calculated. Calculated results are compared with the measured values obtained in the Boston Symphony Hall. Agreement with measured results is satisfactory for stationary noise and also for music. Thus the presented method of calculating IACC can be utilized for any sound source in a concert hall. Also discussed is the correspondence between the measured IACCs and the results obtained by a simulation of the sound field using the plan and cross sections of the hall.