Auditory Demos

Auditory Demo: Critical Bands By Masking

a 2000-Hz tone is presented in 10 decreasing steps of 5 dB;
signal is masked with broadband noise and then with noise having bandwidths of 1000 Hz, 250 Hz, and 10 Hz; $\fbox{\parbox{5.5in}{ \item since the CB at 2000 Hz is about 280 Hz, you would e... ...onstant, its intensity and loudness will decrease as bandwidth is decreased. }}$

Auditory Demo: CB by Loudness Comparison

reference noise: 1000-Hz center frequency with 15% bandwidth;
reference is followed by a second noise burst with bandwidth increasing in steps of 15% (amplitude is decreased to keep power constant).
when bandwidth exceeds CB loudess increases.

``Music 175: Loudness'' by Tamara Smyth, Department of Music, University of California, San Diego (UCSD).