Here's how to make your own white noise machine out of things you may already have "in stock", or can be purchased inexpensively.
Step 1: MP3 Player
* A six-year old iPod Mini with A/C adapter that was sitting in a drawer.
* Computer speakers with A/C adapter. Any cheap speakers will suffice -- we’re only playing noise!
* Software to create the white noise
If you don’t have these items on hand, they can be easily purchased on eBay for under $20.
Step 2: Free Audacity Software
Download Audacity software.
Step 3: Create Custom White Noise
After a bit of trial and error, I finalized on a left channel of pink noise and a right channel of brown noise. It produced a sound I liked.
Sample white noise
My final custom noise file was one hour in length, which could be looped indefinitely throughout the night — or day. I also made another “drift off to sleep” variation that slowly faded out after 20 minutes.