Dana S. Hougl
David L. Adams Associates, Inc., 1701 Boulder St., Denver, CO 80211
A recently completed project to modify the acoustical performance of Boettcher Concert Hall included the addition of several modifications to improve cross-stage hearing of the musicians. Boettcher Concert Hall utilizes an in-the-round seating arrangement, therefore, the enclosure design was restricted to partial height. Custom designed quadratic diffusors were incorporated into the concert shell design. Tests were conducted both on an individual panel section in an anechoic chamber and in situ. The results of the tests are presented.