A sound wave is a vibration that travels through a solid, liquid or gas such as the air or water. A loud sound has a large amplitude, a high pitched sound has a high frequency. Musicians and ...

The burst of air is as inevitable as a crashing wave. But with conscious ... meaning they vibrate to produce sound — and are the basis for our voice. A loud sneeze engages the same vocal process ...

Or jackhammer, or chain saw loud. That’s what the Globe discovered at several of the T’s most infamously noisy sections, with help from a sound level meter that measured the decibel output of ...

(FOX 5/KUSI) — Another series of loud booms may be heard across San Diego ... Depending on atmospheric conditions, however, the sound of the explosions may be amplified and heard up to 50 ...