| BEE SOUNDS are analyzed by a sound spectrograph.
A short segment of a bee sound, recorded in the field, is transferred
to the magnetic disk and then repeatedly sampled as the disk
rotates with the recording drum. The stylus is a wire from which
an electric spark passes to the drum, etching the recording paper.
As the stylus rises, its position regulates the filter control
so that the frequency analyzer extracts the proper frequency
from the total sound, which is broken into a frequency "spectrum"
changing with time. |
