An algorithm for calculation of material loss factors using single degree of freedom method and digital data measured by FFT analyzer
Toshiyuki Maeda · The Journal of the Acoustical Society of America · 1998
The half-power band-width method that is conventionally used to calculate material loss factors cooperated with one single degree of freedom method using data of each resonance response of a material bring out estimation errors caused by approximation of resonance frequency due to discrete frequency when data are measured with FFT analyzer. The proposed new algorithm is able to determine the actual resonance frequency, and its amplitude directly from digital data and loss factors without approximation.