are susceptible to drafts up to pre-storm gusts. (Flies travel at their own risk through
these potentially hazardous strands, however, there usually are
no fly problems on dry, clear and breezy days.)
Upon entering the pre-amp, the combined
signals are fed into an audio amplifier. With a house that has extra windows it is an intercepted
realtime multiple sound source. Des Moines
Register photograph
construction, 1974-1975 
and
details showing stainless pigtails held taut by stainless steel
wires from a Webcor-Chicago wire recorder. As you can see, they
approach being less than hair diameter.
parabola
in '06

Des Moines Register
Article: "Leif Brush and
the Earth Philharmonic"![]() |
Three 9 gauge wires attached
to trees at opposite sides of the our lawn passed directly over
the garden.
(1974 recorded crickets
were played back over this area as the 1975 insects were sounding
in late August)
single Raindrop
(it seemed to be flat & not a tear drop) Monitor was
a twenty foot aluminum spiral and
metal plate suspended from a tree.
On the outside, a guyed rectilinear
jute frame was suspended from a horizontal tree branch with the
end being anchored to the ground. Beeswax adhered
Shadow sensors on this "pigs tail" below the plate.
The spirals potential resonance was diminished by 2 inch balsam
wooden dowels placed inline as dampers before and immediately
after the plate. Drops which passed through the hole could be
identified as dampened thuds which lacked the prolonged ringing
that you'd expect to hear if longer portions of the coil were
sounded.
Proposed
interactive Terrain-bound instrument (not built), 1974
drawing Steel
farm tractor seat is attached to a flat spring(y) steel bar. One
inch steel plates are attached to in-ground concrete bases. The
tie-down of these varying gauges of stainless steel strands was
to be X distance and ending secured to and in-ground eye bolt.