摘要
分析声吸收的基本原理,研究现有的大气声吸收的计算方法,运用新的大气声吸收的计算方法,计算民航客机在运营过程中产生的噪声在大气中的衰减量,并对影响其衰减的因素进行分析,然后将其结果与标准中提出的大气声衰减的方法进行比较。通过对比可得出,本文所采用的方法对声衰减的计算更加准确。
In this paper, the basic principle of sound absorption is analyzed, and the existing methods for calculating the at- mospheric acoustic absorption are studied. The new calculation method of atmospheric absorption is used to calculate the attenuation of the aircraft noise which is produced in operation process, and the factors that would affect the attenuation are analyzed. Then the results are compared with the existing ARP 866A standards in the calculation of aircraft noise certification lev- els. By the comparison, a conclusion can be received that the calculation method of acoustic attenuation adopted in this paper is more accurate than the ARP 866A methods. The new method will provide a great help for the governance of civil aviation noise pollution.
出处
《机械研究与应用》
2015年第4期33-36,共4页
Mechanical Research & Application
关键词
声学
飞机噪声
声衰减系数
1/3倍频程
acoustics
aircraft noise
acoustic attenuation coefficient
one-third octave band
