Do you know what a decibel is? You probably have a general idea it measures sound. A decibel measures the intensity of sound. It is similar to measurements we use for earthquakes – each decibel multiplies the last one. This is because the human ear can pick up an amazing range of sound. Start with silence at zero decibels or dB. A whisper is 15 dB. A normal conversation (normal, not YELLING) is 60 dB. A lawnmower is 90 dB. A car horn is 110 dB – but thank goodness you’re usually not standing right next to it. A firecracker is 140 dB.… Read More