The sound-related parameters revealed significantly (p < 0.05) higher total sound energy and mean intensity values, especially in the inulin15 biscuits, in comparison to the control. The maximum intensity values were also higher for inulin15, inulin30 and HPMC30 than for the control. No significant differences in the number of sound pulses were found among the different samples except for HPMC30, which showed a higher number than the control biscuit.