Methods for determining and analyzing cut-off frequency of photoacoustic signal

The paper presents the basic definitions of characteristic cut-off frequency and various methods for determining and analyzing these values of photoacoustic signals. Also, the work will check the accuracy of the methods used. The cut-off frequency represents the frequency value on the amplitude char...

Full description

Saved in:
Bibliographic Details
Published in2023 10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN) pp. 1 - 4
Main Authors Stanojevic, Neda, Markushev, Dragana, Aleksic, Sanja, Markushev, Dragan, Pantic, Dragan, Pantic, Aleksandar
Format Conference Proceeding
LanguageEnglish
Published IEEE 05.06.2023
Subjects
Bode plot
cut-off frequency
Cutoff frequency
Fitting
Gain
Low-pass filters
low-pass RC filter
Manuals
photoacoustic
Reliability
Online AccessGet full text

Cover

More Information
Summary:The paper presents the basic definitions of characteristic cut-off frequency and various methods for determining and analyzing these values of photoacoustic signals. Also, the work will check the accuracy of the methods used. The cut-off frequency represents the frequency value on the amplitude characteristic at which the gain drops by 3 dB in relation to the nominal gain (observed in a logarithmic scale). To be able to make an analogy between low-pass RC filters and the photoacoustic signal, it is necessary to determine the values of the cut-off frequencies and their further comparison with the thickness of the samples of the material used. Two methods are shown. The characteristic frequency can be approximately determined by finding the point of intersection of the amplitude asymptotes. Another way is to fit the amplitude of the photoelastic component of the photoacoustic signal with a defined function. Apart from the explanation of the methods themselves, the paper will examine the reliability of both methods.
DOI:10.1109/IcETRAN59631.2023.10192238