[IEEE its Applications (CSPA) - Penang, Malaysia (2011.03.4-2011.03.6)] 2011 IEEE 7th International Colloquium on Signal Processing and its Applications - The classification of material mechanical properties using non-destructive vibration techniqueAbd Rahim, Intan Maisarah; Mat, Fauziah; Yaacob, Sazali; Siregar, Rakhmad Arief · 2011