1. The relation between the sone and phon scales of loudness;Robinson;Acustica,1953
2. The measurement of loudness;Stevens;J. acoust. Soc. Am.,1955
3. Proposed standards for noise measurement;American Standards Association;J. acoust. Soc. Am.,1933
4. Proposed standards for noise measurement;American Standards Association;J. acoust. Soc. Am.,1942
5. Loudness, its definition, measurement and calculation;Fletcher;J. acoust. Soc. Am.,1933