Consumer & Gadgets

New device puts music in your head—no headphones required

Imagine a world where you move around in your own personal sound bubble. You listen to your favorite tunes, play loud computer games, watch a movie or get navigation directions in your car—all without disturbing those around ...

Consumer & Gadgets

Ditch the soundbar with new Amazon Echo speakers

Besides sporting a new round look, Amazon's updated fourth generation Echo speakers have something else going for them. Buy a pair for $200 and they make fabulous TV speakers.

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Sound

Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.

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