Band noise (Yoshitaka Nakajima )  Subject: Band noise Date:
Fri, 6 Jun 1997 15:38:47 +0900  Dear Dr. Husain, I often employ
a very primitive technique to generate noise, which might be
criticized in the field of acoustic engineering. For people in
the field of auditory psychology, however, the technique seems
practical (People who are not studying practical things are
sometimes practical.). 1. Divide the frequency band into N cells
(= subbands). The cells are numbered from 1 to N according to
their center frequencies. The cells must be small enough
compared with critical bands (or auditory filters). 2. Choose a
representative component, whose frequency and initial phase are
determined randomly, from the cells 1 and 2. Choose a
representative in the same way from the cells 2 and 3 (Notice
that the cell 2 has two chances to offer a representative
component.). --- Choose a representative from the cells N-1 and
N. Choose a representative from the cells N and 1. Thus each
cell had two chances to offer a represe