Compare intensities:

100dB vs 75dB

Intensity of a wave is the power per unit area carried by a wave. Decibels are the unit of intensities. They are generally used to express the intensity of sound waves.

They higher the decibel rating of a sound, the more intensity it carries.

A sound with rated 100dB has higher intensity compared to one with 75dB.

100dB sound is in the domain of factory noise.

75dB is in the threshold of a noisy office and classroom.