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在大量的风笛试验测量基础上,比较了不同型号机车风笛的声学性能,试验结果表明:机车前方中心0°大约30m处的声级为105～112dB(A);风笛与机车正前方线路中心线夹角为0°～45°弧范围内,国产风笛声级波动范围在2～8dB(A)之间,0°～90°弧范围内,约为6～11dB(A)。而对不同测点的加拿大和谐式及美国风笛的声级比较,差值均在1～2dB(A)范围内波动。加拿大和谐式及美国的风笛声能主要集中在250～4000Hz;而国产风笛主要集中在500～8000Hz。提出了国产风笛与国外风笛在声学性能上的差距,强调风笛频谱特性的重要性。
Based on a large number of bagpiper test measurements, the acoustic performance of the bagpipes of different locomotives was compared. The test results show that the sound level at the position about 0 ° in front of the locomotive is 105 ~ 112dB (A) at about 30m; The included angle ranges from 0 ° to 45 °, and the domestic bagpipe sound level fluctuates between 2 ~ 8dB (A) and 0 ~ 90 °, which is about 6 ~ 11dB (A). However, the sound level of the Harmony Canadian and the American bagpipes at different measuring points are all in the range of 1 ~ 2dB (A). Canadian harmony and the United States can mainly focus on the bagpipe 250 ~ 4000Hz; while the domestic bagpipes are mainly concentrated in 500 ~ 8000Hz. The differences between the acoustic performances of domestic bagpipes and foreign bagpipes are put forward, emphasizing the importance of the bagpipe’s spectral characteristics.