Modelling the Group Size for Prediction of the Noise Level in Eating Establishments

Invited paper

David Svensson

Lloyd's Register Consulting

Wednesday 3 june, 2015, 10:00 - 10:20

0.9 Athens (118)

This paper is concerned with prediction of the noise level in large eating establishments. As part of a recent study of the subjective concept of acoustic comfort in eating establishments, an attempt was made at expanding the prediction model for the ambient noise level in eating establishments proposed by Rindel, by inserting a model for the group size parameter. In this project, the noise level and impulse response was measured in five different eating establishments in order to compute several different objective acoustic parameters for each of the rooms. The group size parameter was investigated in two different ways; as a single-number average parameter for each eating establishment and as a time-varying parameter. A linear regression analysis using several different objective parameters, including room dimensions and the acoustic room parameters from the IR measurements, resulted in models for both types of group size parameter. In the end, a model for the average group size with the average number of people, the ceiling height and the Definition (D<sub>50</sub>) as variables, was used to expand Rindelís model for the noise level in eating establishments, making the prediction model reliant on simple objective parameters.

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