论文信息 - On the influence of the ceiling profile on the distribution of the room acoustical parameters and the reverberation time

On the influence of the ceiling profile on the distribution of the room acoustical parameters and the reverberation time

Room acoustical parameters as the sound pressure level decay, the Deutlichkeit (distinctness), the EDT are influenced mainly by the longitudinal section of an auditorium, especially its ceiling profile. But does also the reverberation time (with same volume and absorption area) depend on the ceiling profile? Has a (conical) tent-shaped hall as the 'Philharmonie' in Berlin or the new 'Elbphilharmonie' in Hamburg a smaller reverberation time than a shoe-box, or is always Sabine right? How does this depend on the 'roughness' respectively diffusivity of the surfaces? This mainly 2-dimensional problem has been investigated by a sound particle simulation (ray tracing) programme. It turns out that, if the surfaces are not totally diffusely scattering, there is a considerable influence of the ceiling profile on the reverberation time.

Uwe M. Stephenson

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