Abstract
For reproducibility of simplified sound isolation tests [when a large (∼ 12 m) approximately spherical, omnidirectional sound source is not used], it is appropriate to specify requirements for source placement. A scale model of a building with an exaggerated lopsided but reasonable quantity of absorption in one room (panel absorbers on wall surfaces around one corner) was used to investigate deviation of radiated power for the corner position from rigid wall conditions, the objective being to excite modes to an extent depending on their frequency and not mode number. The model and experiment will be discussed, and the results for this model as well as those for a full‐sized baffled loudspeaker will be given. The placement is of more importance in countries where the 100‐Hz, one‐third octave band is included. In light of annoyance from hi‐fi bass, the European range would seem more appropriate.
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