Hi Safelydiet,
On http://safelyhealth.blogspot.com/2011/02/having-better-quality-of-sleep-with.html, the link to soundtherapymachine.com is broken — the site shut down.
If you mention alternatives, thewhitenoiseapp.com might be a useful "try before you buy" option for readers: a free browser-based white noise player with a sleep timer, no ads. A lot of people test noise colors there before spending $50 on a machine.
Either way, the dead link is worth removing.
Anthony
thewhitenoiseapp.com
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