The paper “Berlage Oscillaror as a Mathematical Model of High-Frequency Geoacoustic Emission with One Dislocation Source” has been published in Acoustics Journal by MDPI

Authors: Programmer of the Laboratory of Acoustic Research of IKIR FEB RAS, Sergienko Darya Faritovna and the Leading Researcher of the Laboratory of Physical Process Modeling of IKIR FEB RAS, Dr. Sci. (Phys.-Math.) Parovik Roman Ivanovich.

A mathematical model of high-frequency geoacoustic emission for a single dislocation radiation source is suggested in the papper. The mathematical model is a linear Berlage oscillator with non-constant coefficients whose solution is the Berlage function momentum.

Further, the values of the parameters of the Berlage pulse are specified using experimental data. For this purpose, the problem of multidimensional optimization is solved, which consists of two stages: global optimization using the differential evolution method and local optimization according to the Nelder-Mead method.

Statistics are given to confirm the correctness of the obtained results: standard error and coefficient of determination. It is shown that two-stage multivariate optimization makes it possible to refine the parameters of the Berlage pulse with a sufficiently high accuracy to describe high-frequency geoacoustic emission.

Full text of the paper is available here.

For reference: Sergienko, D.; Parovik, R. Berlage Oscillator as a Mathematical Model of High-Frequency Geoacoustic Emission with One Dislocation Source. Acoustics 2025, 7, 65. https://doi.org/10.3390/acoustics7040065