Effect of orchestra pit arrangement on sound strength in Wroclaw Opera House
- Autores: Krzysztof Rudno-Rudzinski
- Localización: Proceedings of the ISRA 2007 Seville, Vol. 2, 2008 (Poster Session Communications), ISBN 9788469082676
- Idioma: inglés
- Enlaces
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Resumen
As part of the recently completed renovation of the Wroc?aw Opera House the orchestra pit has been enlarged by moving its back wall further into the space beneath the stage. As a result, the orchestra pit is covered for about 40% of its length. The ceiling in the covered part has been lined with sound absorbing material. Also a floor with adjustable elevation has been installed in the pit's open part. Measurements of sound strength (G) for a source located under the overhang were performed on the ground floor, on the balconies, on the stage and at the conductor's stand. The measurements were carried out for: two pit floor levels, two sound source elevations and reflective versus absorptive ceiling above the source. The measurements showed that as a result of the replacement of the sound absorbing ceiling with the reflective one the strength of sound from the source under the overhang has increased. The difference in G exceeds the threshold value. An increase in G was perceptible on the ground floor and on the balconies when the pit's floor and the sound source were raised at the same time. Raising the floor alone without raising the source did not produce an increase in sound strength.
