Noise reduction in provender mills
Poluektov, A.; Gneushev, A.; Kondrat' eva, L.
Mukomol'no- Elevatornaya i Kombikormovaya Promyshlennost' 11: 33-34
Using microphones, sound level meters and noise analysers, the noise emitted by electric motors, grain cleaners, mills, fans, elevators, chain conveyors, conveyor ducts and other equipment in various buildings preparing feedingstuffs was measured and subjected to spectral analysis. In one installation the noise level was reduced by 2.5 - 9.0 dB by fitting a noise absorbing cowling round the electric motor.