loudness

Loudness is the quality of a sound that is the primary psychological correlate of physical strength (amplitude).Loudness, a subjective measure, is often confused with objective measures of sound pressure such as decibels or intensity. Filters such as A-weighting attempt to adjust sound measurements to correspond to loudness as perceived by the average human. However, true perceived loudness varies from person to person and cannot be measured this way.
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(n.)
The quality or state of being loud.
  

Noun
1. the magnitude of sound (usually in a specified direction); "the kids played their music at full volume"
(synonym) volume, intensity
(antonym) softness
(hypernym) sound property
(hyponym) crescendo
(attribute) loud
2. tasteless showiness
(synonym) flashiness, garishness, gaudiness, brashness, meretriciousness, tawdriness, glitz
(hypernym) tastelessness