Abstract:
In order to examine the effects of multiple scattering by trees, acoustical measurements were carried out on a pathway in a forest in Kirishima, Japan. Four physical parameters of sound fields, i.e., the listening level, the initial time delay gap, the subsequent reverberation time, and the IACC, were measured. It was found that such an outdoor space in a forest has excellent acoustic properties, especially regarding factors of the subsequent reverberation time and the IACC. It is interesting to notice that this kind of characteristic due to scattering by trees may be taken into consideration in designing a sound field by use of a number of columns in a concert hall.