Understanding the effect of geometric forms on indoor soundscape assessment: a case study in CSO concert halls in Ankara, Turkey

This study aims to compare the indoor soundscape of two concert halls with different geometric forms. The study included Presidential Symphony Orchestra (CSO) Concert Hall (CH) and CSO Grand Hall (GH) in Ankara, Turkey. CH was in shoebox form, and GH had vineyard form. Participants consisted of undergraduate students of the Interior Architecture and Environmental Design Department of Bilkent University. Twenty females and twenty males were selected between the ages of 20-25. They were randomly divided into two groups as CH and GH. An online listening test with the same music but different recordings of each hall was applied. Also, tests had the visuals of the relevant concert hall. The perceptual data was collected with the questionnaire from ISO/TS 12913 2 Method A. The results showed that the overall soundscape quality of GH was perceived as more positive than CH. The surrounding sound in GH was more eventful and pleasant than CH.