Expressed as a formula, the intensity of a sound in decibels is 10 log10 (S1/S2), where S1 and S2 are the intensity of the two sounds. The range of hearing is vast: from 0.000000000001 W/m2 to 0. ...

Using this logarithmic scale, a sound with an intensity of 20 decibels is 10 times more intense than a sound at 10 decibels. Likewise, a sound at 100 decibels is one billion times more intense ...

The PHON scale was devised to express this subjective impression of loudness, since the DECIBEL scale alone refers to actual sound pressure or sound intensity levels. Historically, the A, B, and C ...

The decibel is an arbitrary unit such that, starting from the zero level or threshold of hearing, each increase of one decibel represents an increase of 25% in the physical intensity of the sound ...

Sound intensity is about much more than loudness, which is our perception of sound. If you double the intensity of a sound wave, it doesn’t necessarily mean it will sound twice as loud. Typically, a ...