🚀 go-pugleaf

A friend of mine is bothered by minor noises when she is trying to sleep
(birds, rain, cosmic radiation, etc) and frequently runs a fan in her
bedroom to drown out distractions.  I recall from time-to-time encountering
articles and ads for various types of noise generators intended for people
with the above problems.  The simplest ones (as I recall) just amplified
the hash from a reverse-biased zener; more elaborate systems had filters
with time-varying passbands to produce surf sounds.  I would like to track
down one of these doodads.  If you know of (a) commercial products, (b) kits,
or (c) construction articles, I would appreciate a note.

If someone else wishes this information, mail me a note and I'll forward the
results.

Grazi.