空气锤的噪声频带较宽,特别是低中频噪声的声压级较高。我们采用穿孔板-弯头结构组成空气锤的消声器。因穿孔板对低中频噪声消声性能好,而弯头结构则对中高频噪声消声性能好。穿孔板结构是在板上钻穿许多小孔,由小孔及板与壁间的空气层组成消声装置。它的原理是:利用空气分子在消声器内的共振运动消耗能量,在声波的作用下,每一个小孔中的空气分子象一个活塞,进行往复振动运动,因 Air hammer wide noise band, especially the low intermediate frequency noise higher sound pressure level. We use a perforated plate - elbow structure composed of air hammer muffler. Due to perforated plate on the low-frequency noise muffling performance is good, while the elbow structure on the high-frequency noise muffler performance. Perforated plate structure is drilled in the board through many small holes, holes and board and the wall between the air layer to form a silencer. Its principle is: the use of air molecules in the muffler resonance energy consumption, under the action of sound waves, each hole in the air molecules like a piston, the reciprocating vibration movement, due to