Point estimates of effect (unstandardized coefficient, B) and standard error (SE), 95% confidence intervals of B (95% CI) from linear regression models for the total combined answers over distances and signal to noise ratios (dependent variable).

The physical parameters in each category were entered and non-significant variables removed by backward stepwise method; prob of entry = 0.05 and prob of removal = 0.10. Subjective descriptions were not considered to be independent and were hence entered one by one in the model.
¤ width, height, number of hard walls, excluded in the model,
# acoustic panels directly mounted and suspended from the ceiling added as dummy variables with “other” as reference category, directly mounted excluded in the model.
number of shelves added as: zero, one or more than one.
¥ loud, not quiet excluded in the model
Point estimates of effect (unstandardized coefficient, B) and standard error (SE), 95% confidence intervals of B (95% CI) from linear regression models for the total combined answers over distances and signal to noise ratios (dependent variable).