Sound levels are measured on a scale known as the decibel \(dB\) scale. The higher the number the greater is the sound level. Too much noise can damage hearing. Exposure to 90 decibel sound levels ...

The highest recorded decibel was between 50-78 dB on the 10000 block of Rockbridge Circle, which was located 4,135 feet away from the venue. Inside the amphitheater, the highest noise level ...

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 all the rumbling and squealing ...