Spectral characteristics of sounds generated during disintegration of food are significant descriptors of food texture, depending on the material morphology. Different food products possess their own individual spectra(Lewicki et al. 2009). In spectral characteristics, the predominant sounds with low frequencies of up to 10 kHz are typical for crisp products of cereal origin(Duizer 2001). The AE amplitudetime signals were subjected to a Fourier transformation to obtain sound spectra. A typical spectrum of biscuits is shown in Fig. 1A, and average spectral characteristics of samples are given in Fig. 1B. Maxima of acoustic energy were noted at frequencies from the same ranges at 1-2 and 13-16 kHz(Fig. 1). Lewicki et al. (2009), studying the sound emitted by crackers and biscuits with different fat content, observed a similar relationship. Crackers exhibited maxima of acoustic energy at range of 1-3 kHz.