the invention relates to a method u0448u0443u043cu043eu043fu043eu0433u043bu043eu0449u0435u043du0438u044f, based on the theory of refraction of the sound beam.using low-temperature refrigeration system inside and outside the chamber u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu044f, this method is the gradient of temperaturewhen the temperature inside the chamber u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu044f pipeline is higher than the temperature outside the wall of the pipeline.the gradient temperature can affect the sound beam noise, which refracted to the direction where the temperature is low, and thus the signal and reduces the noise. u0441u0442u0435u043c.the invention is based on the theory of mufflers, refraction of the beam containing the u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu044f,on the inner wall of the shell (1) which is u0448u0443u043cu043eu043fu043eu0433u043bu043eu0449u0430u044eu0449u0430u044f structure (4) with the external wall of the shell (1) u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu044f on site.the u0448u0443u043cu043eu043fu043eu0433u043bu043eu0449u0430u044eu0449u0435u0439 construction (4), a low temperature refrigeration system (2).low temperature refrigeration system (2), at least should cover 5% of the area of the outer wall of the shell (1) u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu044f.low temperature refrigeration system (2) is connected with a temperature controller (3) and carries out the quantitative regulation of the gradient of temperature.the invention improves the noise absorbing effect u0448u0443u043cu043eu0433u043bu0443u0448u0438u0442u0435u043bu0435u0439.
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