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Journal of the Society of Motion Picture Engineers ( Volume: 49, Issue: 3, September 1947)
Sound Absorption and Impedance of Acoustical Materials
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- 1 Morse P. M. Bolt R. H. : “Sound Waves in Rooms,” Rev. Mod. Phys. , 16 (April 1944 ), p. 69 .EXTERNAL
- 2 Beranek L. L. : “Precision Measurement of Acoustical Impedance,” J. Acous. Soc. Amer. , 12 (July 1940 ), p. 3 .EXTERNAL
- 3 Beranek L. L. : “Acoustical Impedance of Commercial Materials and the Performance of Rectangular Rooms with One Treated Surface,” J. Acous. Soc. Amer. , 12 (July 1940 ), p. 14 .EXTERNAL
- 4 Beranek L. L. : “Acoustic Impedance of Porous Materials,” J. Acous. Soc. Amer. , 13 (Jan. 1942 ), p. 248 .EXTERNAL
- 5 Olson H. F. Massa Frank : Applied Acoustics , Second Edition , P. Blakiston's Son and Co., Inc. , Philadelphia, Penna. , pp. 33 – 34 .EXTERNAL