. "7th Workshop NDT 2009" . . . . . "non-linear acoustic spectroscopy, light concrete, freeze-thaw cycles"@en . . "NDT of Mechanical Damaged Concrete Specimens by Nonlinear Acoustic Spectroscopy Method"@en . . "[E2B1FAD0DAB3]" . "RIV/00216305:26110/09:PU86602" . "6"^^ . . . "4"^^ . . "2009-11-25+01:00"^^ . "Pl\u0161kov\u00E1, Iveta" . "Kucharczykov\u00E1, Barbara" . "NDT of Mechanical Damaged Concrete Specimens by Nonlinear Acoustic Spectroscopy Method"@en . "Matys\u00EDk, Michal" . "4"^^ . . . . "328795" . "978-80-7204-671-3" . "P(1M06005), P(GP103/09/P252)" . "Current research and development of non-linear ultrasonic spectroscopy methods shows these methods to be very promising for material testing and defectoscopy in the near future. Our experiments focused on the testing of lightweight concrete specimens using the single-frequency excitation method. We studied the concrete specimens structure after having been stressed by a mechanical force. Measurements were realized before and after mechanical loading."@en . "Akademick\u00E9 nakladatelstv\u00ED CERM" . . "Ko\u0159ensk\u00E1, Marta" . "RIV/00216305:26110/09:PU86602!RIV10-MSM-26110___" . "Current research and development of non-linear ultrasonic spectroscopy methods shows these methods to be very promising for material testing and defectoscopy in the near future. Our experiments focused on the testing of lightweight concrete specimens using the single-frequency excitation method. We studied the concrete specimens structure after having been stressed by a mechanical force. Measurements were realized before and after mechanical loading." . "NDT of Mechanical Damaged Concrete Specimens by Nonlinear Acoustic Spectroscopy Method" . . "NDT of Mechanical Damaged Concrete Specimens by Nonlinear Acoustic Spectroscopy Method" . "26110" . "Brno" . . . . "Brno" . . .