ABSTRACT
To be more specific, let us denote the m frequencies of the profile by f., where in the case mentioned m = 21 and i = 1, ... , 21. Denote by Li their perceived intensities. If the index of the signal and carrier frequency is s, then the test observation is of the form:
3. NOISE MASKING AND FACILITATION
narrow band of noise matters. Increasing the bandwidth beyond some critical value does not increase the masking effect of noise. It is important not to confuse this fact, namely, that after a certain bandwidth is reached noise has no additional ability to mask a pure tone, with a second fact, namely, that the overall loudness of the noise increases steadily as the bandwidth increases. Beyond a certain point, the increased loudness of the noise simply has no further effect on detectability.
