the soothing sound of the rain. Just let this play while you are doing your work and let your worries wash away. You can adjust the intensity of the rain drops, the frequency of thunder and the volume. It even has a sleep timer--and all for free!
Velleman Pink Noise Generator Kit Pseudo random digital noise! Adjustable from 30-100kHz! Optimize your acoustics Runs on 1-12VAC or 12-15VDCs! Electronic kit, assembly required