By muffling volume of barrel dissipative muffler is tested in test-bed, muffling volume of A class and each time of spectrum are obtained under various velocity of airflow.

• 通过实验台对筒式阻性消声器的消声量进行测试,测得了不同气流速度下,筒式阻性消声器的A声级消声量和各倍频程的消声量。