Reduction of heater noise in vinyl greenhouses. II: Reduction of noise

Umeda, S.; Mohri, K.; Murata, T.; Morita, S.

Journal of the Society of Agricultural Machinery 40(1): 99-103


Heater noise in a greenhouse was reduced by 7-9 dB(A) by using a sound proof wall consisting of a perforated wooden plate with an air layer and sound absorbing urethane foam and chaff.