NC contours rate noise but do not guarantee satisfactory spectral quality

Evidence

One main advantage of using LTAS is that the spectral features of interest during the steady-state portion of the note are enhanced in the resulting plot by the averaging process with respect to competing acoustic sounds, such as background noise, which change over the period of the LTAS and thus average toward zero. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1431 (#contradicts, via linked claim)

Categorization

• XREF: connects to: Equal-loudness contour data have been repeatedly revised and corrected; Long-term averaging of spectra suppresses random background noise — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1431; Equal-loudness-contour weighting schemes failed as loudness meters

Broader Connections

• Equal-loudness-contour weighting schemes failed as loudness meters #expands (0.75)
• Equal-loudness contour data have been repeatedly revised and corrected #qualifies (0.72)
• Long-term averaging of spectra suppresses random background noise #contradicts (0.70) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1431