Abstract
To better understand edge diffraction in room acoustics, scattering is measured from 1:10 scale models of reflector arrays and a stage house. The source is an 11-cm dodecahedron with tweeter elements having an effective frequency range of 600–6000 Hz. Maximum-length sequences (MLS) are used, which have various advantages over spark sources for scale models. The main three reflector arrays have approximately the same equivalent area: an array of five long rectangular panels, a 7-by-5 array of smaller square panels, and a single solid panel. Measurements are taken along a line under the reflector arrays and repeated for different array sizes and coverage. The stage-house measurements include a stepped reflector array and receiver positions shadowed from the receiver. Results compare well with previous work [R. W. Leonard et al., J. Acoust. Soc. Am. 36, 2328–2333 (1964)], and some practical rules of thumb are discussed. [Work performed as guest of the Inst. fuer Techn. Akustik, RWTH-Aachen, Germany; support provided by the Axson Johnson Foundation, Sweden.]
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