一、引言最近,加拿大和美国的一些实验室采用相同样品和测量设备进行了声吸收测量,为在一系列不同混响室进行同一声源的声动功率测量创造了条件。被测声功率级的差别反映出混响室几何形状,吸收或扩散体结构的差异。 I. INTRODUCTION Recently, some laboratories in Canada and the United States conducted acoustic absorption measurements using the same sample and measurement equipment, creating the conditions for acoustic power measurements of the same source in a range of different reverb chambers. The difference between the measured sound power levels reflects the geometry of the reverberation chamber, the differences in the structure of the absorber or diffuser.