al sound-wave and itsechoes. For example, Fig. 14 shows in silhouette the principal longi-tudinal section of the main auditorium of the New Theatre. WW isa photograph of a sound-wave which has entered the main auditoriumfrom a point on the stage at an ordinary distance back of the pros-cenium arch;… … Pig. 21. Photograph of the direct sound, WW, and of theechoes from the various surfaces; 02,3, a wave, or echo, dueto the combination of two waves which originated at theorchestra pit; cj from the oval panel in the ceiling; c^ andCs, from the ceiling mouldings and cornice over the prosce-nium arch;…
Architectural acoustics
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![An illustration from Catalogue of the international exhibition of contemporary medals. March, 1910 [electronic resource] (1911)](https://img.insideoutlibrary.com/img/200/ia-bml-NK6310_Am3-161-180.webp)
