噪声问题是燃气机热泵走向商业化的一个难题，本文在分析了声源特点的基础上，结合声学理论与实际经验，建立了隔声罩三维模型与双室抗性消声器模型，使用RAYNOISE软件对加装隔声罩前后的燃气机热泵机组的噪声场进行模拟，并且根据本实验台的实际情况设计了燃气机热泵机组的隔声装置，对采用降噪装置后的实验台进行实验测量，总声压级降到77.8dB(A)，通过实验验证了设计的合理性。

The problem brought by noise becomes an impediment to make GEHP commercialized. The paper establishes three-dimensional model of acoustic enclosure and model of double chamber fastness muffler on the bases of acoustics spectrum analysis coupled with acoustic theory. And the simulation of the noisy level of a GEHP with and without acoustical enclosure by the RAYNOISE software has been finished. Then the sound insulation device is designed according to the practical situation of the GEHP. And it can be concluded from experiment that the sound pressure level is sharply reduced to 77.8 dB (A) after fixed the sound insulation device, which improves the validity of the design about the noise control of GEHP.