Discrete spectral analysis of acoustic pulses in optoacoustic investigations of polymers and composites

Title	Discrete spectral analysis of acoustic pulses in optoacoustic investigations of polymers and composites
Authors	S. A. Chertishcheva¹, Y. V. Sudenkov¹, A. Y. Kuchmin² ¹Saint Petersburg State University ²Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences
Annotation	The paper presents a developed methodology for discrete spectral analysis of pulsed acoustic signals. The results of the spectral analysis of nanosecond acoustic pulses recorded during optoacoustic defectoscopy of polymer and composite samples are presented. The advantages of the proposed technique over the standard Fast Fourier Transform (FFT) method are demonstrated.
Keywords	optoacoustics, discrete spectral analysis, wavelet filtering.
Citation	Chertishcheva S. A., Sudenkov Y. V., Kuchmin A. Y. ''Discrete spectral analysis of acoustic pulses in optoacoustic investigations of polymers and composites'' [Electronic resource]. Mathematical modeling, numerical methods, and software systems: Collection of materials from the 12th All‑Russian Scientific Youth School‑Seminar named after E. V. Voskresensky (Saransk, July 21–24, 2026). - pp. 241-243. Available at: https://conf.svmo.ru/files/2026/papers/paper114.pdf. - Date of access: 25.09.2026.