| The LISTENING VESSELS
consist of two large parabolic reflectors set at least 50 feet apart
which act as mirrors to reflect sound from one to the other. Two
people sit opposite each other at approximately the focal point
for each reflector, so that the sound coming from each reflector
is focused at this point, allowing each visitor to clearly hear
the other's voice in spite of the distance separating them or the
noise in the museum.