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Jont Allen has also brought to my attention that Harvey Fletcher also worked
with noise that stimulates all filters equally. Dr. Fletcher appears not
to have coined a term (at least I couldn't find one in a quick glance through
the pages suggested by Jont), but it seems appropriate to mention his work in
this context. The portion of the note from Jont attached below has more
> From email@example.com Thu Apr 11 18:29:49 1996
> Date: Thu, 11 Apr 1996 12:18:28 -0400
> From: Jont Allen <firstname.lastname@example.org>
> To: Bill Woods <email@example.com>
> Subject: Re: Terminology
> Cc: firstname.lastname@example.org
> Content-Length: 618
> Approximately speaking, it is called pink noise. Fletcher generated
> such noise to do the critical band experiments in 1937 and 1938.
> The spectrum of the noise first appeard in JASA, Fig. 5, page 282,
> Vol 9, #4, April 1938. You can also find this figure in Fletcher's
> book. Look at the ASA edition on page 166, curve labled B_N.
> It is further discussed on pages 202-203.
> I would call it iso-masking noise or constant-masking noise.
> In fact I call it "constant masking" noise on page A25 of the
> ASA edition.