Aeration Supply Premium Lake Aerators Optional Sound Reduction ShroudSound Reduction Shroud Quiet Your Aeration System A sound reduction shroud makes your aeration system fade into the background. Compressors are efficient and reliable, but they still produce a steady hum that you may not want near patios, cabins, or homes. The shroud surrounds the compressor with noise dampening materials and optimized airflow, cutting the noise so you hear your pondnot the equipment. You dont sacrifice performance to get that quiet.