Yogasleep Dohm Classic Original White Noise Machine. The sleep-inducing magic of a Yogasleep sound machine makes falling asleep as easy as pushing a button. Dohm Classic is the original sound machine first invented by Yogasleep in 1962 and beloved by generations since. The Classic features Yogasleep s signature fan-based natural white noise with two speed options for widely adjustable tone and volume. Just flip the switch to high or low rotate the cap and collar to find the best sound for you then let the noise-masking magic happen. Give sleep a chance!