Abstract:
The noise characteristics of 3-channelusing microphone and spectrum analysis software.nozzle were investigated, in the absence of water,When Ma in channel 3 increased, noise intensity increased monotonously; frequency of the peak remained the same, but its power became stronger. When Ma in channel 1 increased, noise intensity decreased initially but then increased; the high frequency peak appeared, and its power became stronger. Changing the ratio of air velocity in nozzle of channel 1 to channel 3, the noise intensity decreased, then increased, and decreased again~ frequency of peak increased.