<P> A-weighting follows human sensitivity to sound and describes relative perceived loudness for at quiet to moderate speech levels, around 40 phons . </P> <P> Relative loudness monitoring in production is measured in accordance with ITU - R BS. 1770 in units of LKFS . </P> <P> Work began on ITU - R BS. 1770 in 2001 after 0 dBFS+ level distortion in converters and lossy codecs had become evident; and the original Leq (RLB) loudness metric was proposed by Gilbert Soulodre in 2003 . Based on data from subjective listening tests, Leq (RLB) compared favorably to numerous other algorithms . CBC, Dolby and TC Electronic and numerous broadcasters contributed to the listening tests . </P> <P> Loudness levels measured according to the Leq (RLB) specified in ITU - R BS. 1770 are reported in LKFS units . </P>

The term for the relative loudness of one's voice is