TechGearLab

Much of our modern sleep challenges arise from the demands of the digital world, and no matter how good it sounds, using a digital recording to ward off that digitally-induced insomnia can feel counterintuitive at best. If you fall into this category, the Marpac Dohm Classic was designed with you in mind. It bucks the digital trend by using an actual internal fan to create its white noise. Two sets of slidable vents allow you to finely adjust the pitch and timbre of the noise the fan emits, allowing for a completely customizable experience. The controls couldn't be simpler &mdash; just a single switch to select off, low fan speed, or high fan speed. 
While the more natural, mechanical sound of the Marpac Dohm Classic can often feel more soothing than digital recordings, it won't help if you're looking to recreate the calming river or ocean wave noises that lulled you to sleep on your summer vacation. Additionally, there is no off-timer, so the fan runs uninterrupted all night. Still, if you find the real-world hum of an airplane or whirr of a fan tranquilizing, the Marpac Dohm Classic is the best way we've found to bring that sound into your bedroom. 

Noise Machine Comparison