Scientists have created the loudest-ever underwater sound, measuring more than 270 decibels. The sound, as published in the journal Physical Review Fluids, was created by blasting water microjets with ...

Sound is actually short for sound pressure level, or SPL, Steve Orfield said. It is measured in decibels, or dB, around which there are misconceptions. A few facts: • Zero decibels is not the absence ...

We live in a noisy world, from traffic and aircraft congestion to construction sites, TV shows, and many other sources. But understanding dB measurements can help, as we will soon see. Noise is an ...