2019 Volume 25 Issue 60 Pages 715-718
Regarding scattering coefficient that represents acoustic scattering capability of architectural surfaces, a reverberation room method for measuring random-incidence values has been standardized in ISO 17497-1. Besides, an alternative method for measuring normal-incidence values between parallel walls was recently proposed. In this paper, a 1/4-scale-model measurement system integrated for the two measurements is newly developed, where converting the former system into the latter system in a rectangular room with a circular test sample. In order to validate the converted system for normal-incidence scattering coefficient, the test arrangements are examined in experiments, and the measured results are compared with numerical results.
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