The range of intensities the human ear can pick up is so large that the scale used to measure the intensity is a scale based on multiples of ten. This scale is also known as a logarithmic scale. This scale is also known as the decibel scale. The threshold of hearing is at level 0db. A sound that is 10 times more intense will be at level 10db. A sound that is 100 more intense would be 20db because of the equation 10*10. 
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