Title :
Time-frequency analysis of impact sound of composite materials
Author :
Jitsukawa, Naoki ; Ogawa, Takehiko ; Kanada, Hajime ; Mori, Kiyomi
Author_Institution :
Fac. of Eng., Takushoku Univ., Tokyo, Japan
Abstract :
The method was proposed for examining the characteristics of materials from impact sound. This method was designed to estimate the elasticity of materials, nondestructively and easily. It becomes difficult to estimate accurate elastic moduli of the vibration as the temperature rises, because of the noise and damping. In this study, we introduce the time-frequency analysis for estimating to estimate the accurate elastic moduli. We examine the effectiveness of the short-time Fourier transform and the wavelet transform.
Keywords :
Fourier transforms; acoustic emission testing; composite materials; damping; elastic moduli measurement; elasticity; impact (mechanical); noise; nondestructive testing; time-frequency analysis; wavelet transforms; composite materials; damping; elastic moduli; impact sound analysis; noise; nondestructive material elasticity estimation; short-time Fourier transform; time-frequency analysis; vibration; wavelet transform; Acoustic materials; Acoustic noise; Composite materials; Damping; Design methodology; Elasticity; Fourier transforms; Temperature; Time frequency analysis; Wavelet transforms;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195327
