An investigation was made of the acoustic absorption coefficient of insulation board made from cornstalk pulp. The chief interest was to investigate the change in absorption coefficient clue to progressive alteration of the surface of the board. The specimen boards were one foot square and one inch thick and the absorption was determined for plain board, beveled board, board with a few shallow grooves, with many grooves, and finally with deep grooves. These changes were made progressively on the same boards in order to eliminate variations caused by differences in structure which might otherwise occur.
Proceedings of the Iowa Academy of Science
©1932 Iowa Academy of Science, Inc.
Plagge, H. J.; Wittemore, Edward Richard; and Arnold, L. K.
"Variation of Acoustic Absorption Caused by Different Surface Treatments of Insulation Board,"
Proceedings of the Iowa Academy of Science, 39(1), 219-219.
Available at: https://scholarworks.uni.edu/pias/vol39/iss1/59