sound wave

Depending on its dimensions, the cylinder will ring with radio waves of a specific frequency, just as a bottle will whistle with sound waves of a set pitch if you blow across its mouth.

The energy in sound waves diminishes the farther they travel from the source.

Sonogenetics gives researchers a way to precisely control the brains, while airy-beam technology allows researchers to bend or steer the sound waves to generate arbitrary beam patterns inside the brain with a high spatial resolution.

The sound waves from that speaker's voice then should reach the microphones on both sides of the headset simultaneously; there's a 16-degree margin of error.

First, a fuel droplet is levitated, i.e. trapped in the air, using a standing sound wave.