For many of us sound is an everyday part of our daily lives.

To measure sound, a logarithmic scale is used with the decibel (dB) as the unit of measure.  The sound level of typical daytime urban-based activities can vary between 40dB and 85dB. The typical aircraft noise levels are between 65dB and 95dB.

The following are examples of noise levels from everyday activity:

Noise Levels