Numerous preliminary tests exist for identifying the physical
properties of preserved egg, including the modal analysis, which
is unsuitable because it yields unreliable results. In addition, our
preliminary test was not related to gelling in the preserved eggs
(data not shown). The vibration characteristics of preserved egg
can differ from the signals received when the egg is held in the
hand for testing. Resolving this problem requires identifying a
material that can replace human hands to receive the oscillation
response. The dynamic signal processor transforms time domain
signals into the frequency domain via Fourier transform.
A preserved egg holder was built capable of holding the egg and
subjecting it to oscillation. The vibration signals generated by impact
were sampled via an accelerometer fixed to the egg using
beeswax. The output signals were transferred to a dynamic signal
analyzer for further processing using a personal computer.