uses a physical fan inside an acoustic housing to create natural "rushing air" sounds.

: You can fine-tune the pitch by twisting the outer cap and collar to open or close air holes.

The Marpac Sleepmate 980A Go to product viewer dialog for this item.

is a vintage, dual-speed mechanical white noise machine primarily available as a . While the 980A model name is older, it is the direct predecessor to the current Yogasleep Dohm Classic , which retains the same fan-based technology. Buying the Marpac 980A vs. Dohm Classic is no longer in new production, you have two main paths: The Vintage Original (980A)

: Best found on eBay . Used units typically range from . Look for listings marked as "Tested" to ensure the internal motor is still functional. The Modern Version (Dohm Classic) Go to product viewer dialog for this item. : This is the updated branding of the

“I love that it's air that creates the sound and not digital Audio recorded sounds. Makes a HUGE difference for my autistic son.” Carewell - Medical Supply Store to newer like the Yogasleep Rohm Go to product viewer dialog for this item.

: Unlike digital machines that use loops, the