It's currently short range – about 1m – and relatively quiet at 60dB, but both range and volume should be improved by using higher power transmitters. Audio enclaves are made using ultrasound waves, ...

When an object vibrates it produces a longitudinal wave which travels ... low frequency → a quiet, low pitch sound. Trace 2. large amplitude, low frequency → a loud, low pitch sound.

Sound is a vibration that travels through air as a wave. These waves are created when ... to cancel out noise in designated areas, creating quiet zones to improve focus in workplaces or reduce ...