If you’ve hung around electronics for any length of time, you’ve surely heard of the decibel (often abbreviated dB). The decibel is a measure of a power ratio. Actually, the real measure is ...

LRAD are said to reach a maximum volume of 150 or 160 decibels. A fighter jet engine at take-off reaches around 130 decibels. A normal conversation takes place at roughly 60 decibels, while a ...