Cassava crackers, based in cassava starch and water, were produced by deep-fat frying in oil at 140, 150
and 160 C. Physical properties of cassava crackers were monitored at 5, 10 and 15 s of the frying process,
moisture contents, bulk density, linear expansion and penetration forces and sound emission were evaluated.
The results showed that with increasing frying (time and temperature), the moisture content, the
linear expansion, the number of force and sound peaks significantly increased while the density and maximum
and mean of force peaks decreased. Further it could be seen that with higher temperature the number
of small size air cells increased. Correlations were found between physical and textural properties and
sound emission. Moisture content, bulk density, maximum of sound peak, maximum force and mean
force were negatively correlated with linear expansion, number of sound peaks and number of force