Volume 4, Number 4, 2020
|Number of page(s)||10|
|Published online||11 September 2020|
Investigating the influence of seating area design and enclosure on the seat-dip effect using scale model measurements
Department of Computer Science, Aalto University School of Science, 00076 Aalto, Finland
2 Architectural Acoustics Laboratory, Hanyang University, Seoul 133-791, South Korea
* Corresponding author: firstname.lastname@example.org
Accepted: 20 August 2020
The low-frequency attenuation in the direct sound due to the concert hall seats, i.e., the seat-dip effect, is studied with the help of a scale model comprising an adjustable seating area and an enclosed box. More particularly, different seat underpass sizes and floor raking angles are studied, and the results are averaged over multiple source positions. With the measurements on the seating area only, the main seat-dip frequency is found to depend on the seat back rest height, and on the degree of obstruction of the seat underpass. The attenuation bandwidth is found to depend mainly on the floor raking. The differences become less clear when seating area is enclosed by concert hall walls and ceiling because the early reflections from the concert hall geometry compensate the low-frequency attenuation in the direct sound. In addition, the low frequencies below the main seat-dip frequency are found to increase in the presence of unobstructed seat underpasses, and such seats are recommended for the maximal bass response in a concert hall.
© H. Tahvanainen et al., Published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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