1. Absorption characteristics of acoustic material with perforated facings;Ingard;Journal of the Acoustical Society of America,1951
2. Absorption of sound by resonant panels;Sacerdote;Journal of the Acoustical Society of America,1952
3. The use of perforated facings in designing low frequency resonant absorbers;Gallaway;Journal of the Acoustical Society of America,1952
4. On the theory and design of acoustic resonators;Ingard;Journal of the Acoustical Society of America,1953
5. Perforated facing and sound absorption;Ingard;Journal of the Acoustical Society of America,1954