[delta,sym,asymR,asymL]=data_glasberg1990;
data_glasberg1990 returns data from Fig.5 (left panel only) from Glasberg & Moore (1990) showing notched-noise data measured both in symmetrical and asymetrical conditions at a center frequency (fc) of 100 Hz.
To plot Fig. 5 use
data_glasberg1990('plot');
B. R. Glasberg and B. Moore. Derivation of auditory filter shapes from notched-noise data. Hearing Research, 47(1-2):103--138, 1990.
B. Moore, R. Peters, and B. Glasberg. Auditory filter shapes at low center frequencies. J. Acoust. Soc. Am., 88(1):132--140, 1990.