ASA 125th Meeting Ottawa 1993 May

2aAA8. Comparisons of IACC and LF measurements in halls.

John S. Bradley

M-27, IRC, Natl. Res. Council, Montreal Rd., Ottawa, ON K1A 0R6, Canada

Lateral energy fractions, LF, and inter-aural cross correlations, IACC, have both been proposed as correlates of spaciousness in concert halls. Although, theoretically, related previous measurements have not shown a strong relationship between the two quantities. New measurement results from 80 locations in 10 different halls indicate varying relationships in each of the 6 octave bands from 125 to 4000 Hz. At medium and higher frequencies both LF and IACC values vary among halls. At low frequencies only LF values vary significantly among halls. The two quantities are also shown to vary differently with position in halls. Statistical analyses of the data reveal other objective measures related to these two quantities.