Evaluation of the sound field in a room using PICC

To find an adequate physical parameter that can explain the subjective impression of the sound field properties of a room, the PICC (perceptual interaural cross‐correlation coefficient) is discussed. The PICC is a special interaural cross‐correlation coefficient taking into account Haas' effect on hearing characteristics. Two experiments are reported in this paper. The first experiment was done in an actual auditorium with a volume of 9000 m3. The speech signal sources were recorded at several seats in this auditorium; then a listening test on the subjective evaluation of the spatial impression was performed using these signals. At the same time, the PICC was measured by the synchronous response‐multiplication method at each seat. The experimental results show agreement between the psychological scale of the spatial impression and the value of the PICC. The second experiment examined whether the PICC is useful in explaining the size of the sound image of reproduced sound sources in a small room. Here, a l...