Definitions for "A-Weighting"
Keywords:  roughly, phon, ear, arguably, meter
A standard compensation (weighting) curve sometimes applied to audio measurements to account for the ear's response to low-level sound. Frequently applied to measurements of the residual noise levels of wireless microphone systems and other electronic devices. ("A-weighted noise.")
A frequency-response adjustment of a sound-level meter that makes its reading conform, very roughly, to human response. Attenuates the lower and very high frequency ranges.
See Frequency Weighting