Most earplugs and earmuffs simply act as a barrier to block or muffle sound. Noise-cancelling headphones (and now some in-ear devices) can reduce unwanted sound by using active noise-control ...

Foam earplugs can reduce your noise exposure by about 20 decibels ... Or you can use over-the-ear earmuffs, which are easier to put on and take off but can be hotter and bulkier.

For babies I recommend ear muffs – there are lots of cute options available with softer adjustable (washable) bands for babies and more robust headbands for older kids. Noise-cancelling ...

On the face of it, producing a set of noise cancelling headphones should be a relatively straightforward project. But as [Pete Lewis] found out, things are not always as they seem. The result is a ...