在分析了空气锤噪声组成及其特性的基础上，明确指出对空气锤进排气噪声进行控制是极其重要的。应用声学理论，深入地分析了空气锤进排气噪声产生机理及其特性，首次深入地分析了空气锤四种不同工作循环进排气噪声的大小及频率特性上的差别；首次提出了空气锤进排气噪声控制用消声器应满足的条件，建立了该消声器的结构并对其滤波降噪机理进行了理论探讨和实验研究，所建立的消声器达到了３４ｄＢ（Ａ）的降噪量，寿命长，性能稳定，并不影响空气锤正常工作，是一种较为理想的进排气噪声控制用消声器。 Based on the analysis of the composition and characteristics of air hammer noise, it is clearly pointed out that it is very important to control the air hammer noise. Based on the acoustic theory, the generation mechanism and characteristics of the air hammer noise were analyzed in depth. For the first time, the differences in the size and frequency characteristics of the air intake and exhaust noise of the four different working cycles of the air hammer were analyzed. The structure of the muffler is established and its filtering and noise reduction mechanism is theoretically discussed and experimentally studied. The muffler established achieves 34dB (A) noise reduction, long service life , Stable performance, does not affect the normal work of air hammer, is an ideal noise control exhaust muffler.