The World Health Organization sets 53 dB Lden (the average sound level over a 24-hour period) as the recommended upper limit for traffic noise. This study confirmed that, at this level or above, there ...

We used a professional sound meter to measure the din of daily life and talked to scientists about the health risks it can pose. A looping video of a suburban neighborhood curbside on a cloudy day.

From the Richter scale to sound pressure, many modern units utilize the logarithmic “base 10” system. But to many engineers, the decibel (dB) remains one of the trickiest concepts of test and ...