References
- Churcher B. G., King A. J. The performance of noise meter in terms of the primary standard. J. Inst. electl. Engrs. 1937; 81: 57–90
- Fletcher H., Munson W. Loudness, its definition, measurement and calculation. J. acoust. Soc. Amer. 1933; 5: 82–108
- Kingsbury B. A. A direct comparison of the loudness of pure tones. Phys. Reve. 1927; 29: 588–600
- Robinson D. W., Dadson R. S. A redetermination of the equal-loudness relations for pure-tones. Brit. J. appl. Phys. 1956; 7: 166–181