Noise Analysis and Control for ZB45 Packer and ZJ17 Cigarette Maker

To reduce the noise level at operating position, the noise of ZB45 packer and ZJ17 cigarette maker was separately tested and analyzed with the obtained one third octave diagram and noise spectrogram. The results showed that the noise energy of ZB45 packer and ZJ17 cigarette maker mainly concentrated in middle and low frequency bands, the highest noise level of one third octave of ZB45 packer and ZJ17 cigarette maker was at 63 and 125 Hz, respectively, with the noise level of over 85 dB(A). By means of vibration insulation, noise isolation and acoustical absorption material, the noise level at operating position was reduced to under 85 dB(A).