TY JOUR TI METHODOLOGY FOR STUDYING THE VIBRATIONAL ACTIVITY OF THE VOCAL FOLDS KW vocal folds KW natural vibration frequencies KW fiber optic probe KW laser interferometer KW frequency response JO Russian Journal of Biological Physics and Chemisrty AU Belovolova, L.V. AU Belovolov, M.I. AU Paramonov, V.M. AU Belovolov, M.M. AU Svistushkin, M.V. AU Lunicheva, A.A. PY 2022 IS 7 PB Federal State Educational Institution of Higher Education Sevastopol State University