In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.

混响室是声学专业的实验室用房，它在测量声波无规入射时材料的吸声系数和测量噪声源的声功率级中得到了广泛应用。

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But at the moment, the apparent increase could be attributed to any number of factors, such as better diagnosis, or random fluctuations in the incidence of the disease, rather than the start of an epidemic.

ECONOMIST: Mad-cow disease