double coil

Maken of a roll; film of poli-regin
a roll; steel


Theme: Taking a place the sound, setting the coil on a position.
To making
Making a 200 coil.
puting on the table.
and hearing the sound.


Result: good: the double coil can be better heard than simple coil.

good: the sound is separated.

too bad: the sound can't hear in the other direct,