Lokki, T., Vertanen, H., Kuusinen, A., Pätynen, J., & Tervo, S. (2010, August). Auditorium acoustics assessment with sensory evaluation methods. In Proc. ISRA (pp. 29-31).
The previous study was made using this graphic user interface, where assessors could seamlessly switch between audio clips (just like between wine sips). The continuous scale ranged from 0 to 120.
The assessors were recruited via an online questionnaire with three parts: a) a pure tone audiometric test; b) a test for vocabulary skills, c) triangle test for the discriminative skills of audio stimuli (FromWikipedia: The assessors are presented with three products, two of which are identical and the other one different. The assessors are asked to state which product they believe is the odd one out)
20 assessors were selected, all with music background, and each made four sessions in total. In the first two sessions they made the attribute elicitation and in the last sessions they’ve used the attributes and scales.
As for the analysis, the classification of the attributes could be made manually, but it was made with AHC – Agglomerative hierarchical clustering. Than, further analysis were made using Multiple Factor Analysis (MFA), which has a PCA as basis. The results are presented here.