O.B. Popov1, T.V. Chernysheva2, K.V. Orlov3, P.S. Sapronov4

1–4 Moscow Technical University of Communications and Informatics (Moscow, Russia)

1 olegp45@yandex.ru, 2 krba2012@yandex.ru, 3 kvororloff@yandex.ru, 4 pavelozone@gmail.com

Objective assessment of the sound quality of acoustic systems (AS) is based on the results of subjective statistical tests. However, the specifications for objective measurements of the transmission coefficient of an AS are typically based on the emission of a single-frequency harmonic signal, which does not accurately reflect the operational transmission coefficient when emitting a musical signal. An AS has resonant properties that manifest themselves differently when emitting a single-frequency and multi-frequency signal. The authors have developed a spectral analysis method approaching the capabilities of an auditory analyzer in terms of accuracy and resolution, which enables the evaluation of the frequency response (FR) of the complex transmission coefficient of an AS based on a real signal. It is shown that the obtained estimates differ significantly from the specifications and allow for the development of approaches to objective predictive assessment of AS sound quality, including taking into account the characteristics of audio programs. The authors propose generating the frequency response of a sound broadcasting signal (SBS) transmission channel and its component paths using a real SBS, which allows for the consideration of the specific characteristics of speakers from different manufacturers when emitting various musical signals. A method for measuring the frequency response of a sound broadcasting channel using a real signal is proposed, allowing for improved matching of the emitted musical signal with the properties of a specific AS. Measurements conducted using the developed method confirmed the feasibility of generating an objective estimate of the operational FR of a sound broadcasting channel for specific ASs.

Popov O.B., Chernysheva T.V., Orlov K.V., Sapronov P.S. Actual transmission coefficient of acoustic systems // Electromagnetic waves and electronic systems. 2026. V. 31. № 4. P. 70−80. DOI: https://doi.org/10.18127/j15604128-202604-06

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