In Reply to: Re: OK, all you hi-RPM propellerheads........... posted by john curl on May 03, 2003 at 11:26:33:
As you say, Cheever implies that his Fig 2-2 is taken from the same source as 2-1 (*Music, Physics, and Engineering*), but I don't find it there. I do find some masking charts in Olson's *Applied Acoustics* (1934, p. 401) which originate with Fletcher, but these are different in format than what Cheever shows. Cheevers chart may have been derived from these or from something like these. The Crandall group (which later became Fletcher's group) did lots of work in this area for the Telephone Company. You can find the original Wegel and Lane article at UCB or Stanford. As for more recent work in this field, it's a pity that jj jumped ship just now because masking research is right up his codecs alley.
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