"The whole strata community owes a huge debt of gratitude to you and the OCN executive. Much appreciated."
2.4.5 Loudness and sound intensity (power)
The sound intensity/power is the sound energy transferred per second in a specified direction from the noise source to the air. The relative loudness that we perceive is a subjective psychological phenomenon, not something that can be objectively measured. Most of us perceive one sound to be twice as loud as another one when they are about 10 dB apart; for instance, a 60-dB air conditioner will sound twice as loud as a 50-dB refrigerator. Yet that 10-dB difference represents a tenfold increase in intensity.