References
- Knudsen, V. O. & Harris, C. M., Acoustical Designing in Architecture (John Wiley & Sons Inc.), 1951.
- Beranek, L. L., Radford, W. H., Kessler, J. A. & Wiesner, J. B., “Speech-Reinforcement System Evaluation”, Proc. I.R.E., 39 (1951), pp. 1401–8.
- Sabine, H. J., “Room Acoustics”, Trans. I.R.E., A.U.-l (July-August 1953), pp. 4–12.
- Knudsen, V. O., Architectural Acoustics (John Wiley & Sons Inc.), 1949.
- Egan, J. P.; see Beranek, L. L., Acoustic Measurements (John Wiley & Sons Inc.), 1949, p. 628.