The discussion clarifies that sound is measured in decibels (dB), which represent sound intensity rather than energy. Sound pressure level (SPL) is a logarithmic measure of effective sound pressure relative to a reference value, typically 20 µPa RMS, the threshold of human hearing at 1 kHz. The conversation also highlights that different materials produce varying sounds, complicating the prediction of loudness. Understanding these distinctions is essential for accurately measuring and predicting sound levels.
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How come sound isn't measured in Joules if it is a form of energy?
http://en.wikipedia.org/wiki/Sound_pressureSound pressure level (SPL) or sound level is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level. The commonly used "zero" reference sound pressure in air is 20 µPa RMS, which is usually considered the threshold of human hearing (at 1 kHz).