Acoustic Analysis of Articulation Tables of Numbers
A. M. Khvist, Світлана Андріївна Луньова, Alex Grebin · Вісник Національного технічного університету України Київський політехнічний інститут. Серія: Радіотехніка. Радіоапаратобудування · 2023
The article uses the methods of acoustic analysis to study the sound material of the vocabulary sample, which forms an articulation table of numerals in the Ukrainian language.The adapted table of numerals is created by employees of the Institute of Otolaryngology of the National Academy of Medical Sciences of Ukraine based on the translation of a similar Russian-language articulation table by E. M. Harshaka and is recommended for testing the state of hearing.The authors of the article check the general compliance of the proposed test of numerals with the integral characteristics of the Ukrainian language, which is a mandatory condition for the use of the diagnostic test. For this, the method of estimating the averaged speech power spectrum is used. The text of the table is written according to standard requirements. The sound material is processed according to the methodology developed by the authors.The obtained integral spectrum of the sound material of the articulation table and its comparison with the average power spectrum of the Ukrainian language indicate the limited possibilities of using this test for comprehensive hearing diagnostics. In addition, the large size of the articulation table makes it impossible to read it in its entirety. The columns of numerals formed within the table are not interchangeable, as they have a significant difference in spectral characteristics.In the article, for direct testing, based on the general table of numerals, it is proposed to create separate diagnostic tables, balanced by columns or by rows based on the integral characteristics of the language. Balanced tables of numbers are formed according to the maximum difference of ±3 dB between the levels of the spectral density of the power of the sound material within the group in the analyzed frequency range. Recommendations are also provided for using the table of numbers as a test to test hearing and speech intelligibility.