Browsing by Keywords "Acoustic waves"
Now showing items 1-8 of 8
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Classification of closed-and open-shell pistachio nuts using voice-recognition technology
(American Society of Agricultural and Biological Engineers, 2004)An algorithm using speech recognition technology was developed to distinguish pistachio nuts with closed shells from those with open shells. It was observed that upon impact with a steel plate, nuts with closed shells emit ... -
Detection of empty hazelnuts from fully developed nuts by impact acoustics
(2005)Shell-kernel weight ratio is the main determinate of quality and price of hazelnuts. Empty hazelnuts and nuts containing undeveloped kernels may also contain mycotoxin producing molds, which can cause cancer. A prototype ... -
Recognition of vessel acoustic signatures using non-linear teager energy based features
(Institute of Electrical and Electronics Engineers Inc., 2016)This paper proposes a vessel recognition and classification system based on vessel acoustic signatures. Teager Energy Operator (TEO) based Mel Frequency Cepstral Coefficients (MFCC) are used for the first time in Underwater ... -
Response of surface acoustic wave imaging systems to cylindrical inhomogeneities
(IEEE, 1988-10)The authors present a theory to predict the response of a SAW (surface acoustic wave) imaging system. In particular, they calculate the response to cylindrical cavities as a function of cavity position with respect to the ... -
Scattering and absorption performance of a microsize graphene-based parabolic reflector in the THz range illuminated by a complex line source
(Institute of Electrical and Electronics Engineers Inc., 2017)The scattering and absorption characteristics of a two- dimensional (2-D) parabolic reflector made of graphene and placed in the free space is simulated using the Method of Analytical Regularization (MAR) technique. Reflector ... -
A signal representation approach for discrimination between full and empty hazelnuts
(2007)We apply a sparse signal representation approach to impact acoustic signals to discriminate between empty and full hazelnuts. The impact acoustic signals are recorded by dropping the hazelnut shells on a metal plate. The ... -
Sound absorption coefficient changes of acoustical plates made of expanded perlite in moist environment
(WITPress, 2003)Expanded perlite is a porous, lightweight, fire resistant and moisture retaining material with sound and thermal insulation properties. In this research, acoustical behaviour of plates made of expanded perlite was studied ... -
Wave propagation and acoustic band gaps of two-dimensional liquid crystal/solid phononic crystals
(Springer Verlag, 2017)The vast majority of acoustic wave propagation in phononic band studies has been usually carried out by scattering inclusions embedded in a viscoelastic medium, such as air or water. In this study, we present calculated ...
