Effects of changing the amount of absorption in a computer model of Queen's Hall, Copenhagen Denmark

The aim of this research is to improve room acoustics computer modelling by developing a better understanding of the effects of including source directivity. This project focuses on a method that involves using multi-channel anechoic recordings to create multi-channel auralizations. Impulse response (IR) calculations and subsequent auralizations were made using models of an existing hall with varying amounts of absorption in ODEON. The IR calculations are used to compare the differences in the calculated objective parameters of reverberation time (T30) and sound pressure level (SPL) when using four and thirteen channels. Next, subjective testing is conducted to determine if subjects are able to differentiate source orientations from multi-channel auralizations produced for rooms with variable absorption qualities. Subjects’ ratings of listener envelopment are additionally correlated to the objective parameter of late lateral sound energy,