Combine passive blocking of sleep-disturbing sounds with sounds engineered to mask what gets past the blocking

From Bose gets into the business of sleep | TechCrunch

Sleep deprivation costs the US economy $411 billion a year. It’s bad for your health and generally turns you into a cranky piece of garbage no one want to be around. So, naturally, Bose wants to be in the sleep business. Tomorrow, the company launches SleepBuds, its first foray into helping people fall and stay asleep.

There’s no active noise cancelling on-board, unlike Bose’s better known efforts. Instead, the on-board soundscapes (things like leaves rustling and trickling waterfalls) are designed to essentially drown out noise.

The Sleepbuds never blocked the sound altogether. Instead it was more of a mix of sounds with the strange effect of hearing someone snoring off in the distance in a wind-swept field. You can always adjust the sound levels on the app, but you don’t want to make things too loud, for obvious reasons.

Interestingly, the company opted not to offer streaming here, instead storing files locally. There are ten preloaded sounds, with the option of adding more. This was primarily done for battery reasons. You should get about 16 hours on a charge, with 16 additional hours via the charging case.