Abstract
This study deals with the acoustic assessment of the concert hall of the Elementary Art School, aiming to verify its suitability for chamber music performances and to propose optimal acoustic modifications. The assessment was carried out using a combination of theoretical analysis and numerical calculations based on wave, geometrical, and statistical acoustics in accordance with standards STN 73 0525:1964, STN 73 0527:2024, and ISO 3382-1:2009. The main parameters of room acoustics were evaluated-reverberation time, evenness of sound distribution, and diffusive behavior. The results showed that the original design exhibited an extended reverberation time, particularly in higher frequency bands. After implementing Fantoni Letwood 5L acoustic panels, the values stabilized within the optimal range of 1.25–1.30 s, and the sound uniformity improved to ±5 dB. The resulting design meets the requirements for chamber concert spaces and demonstrates the effectiveness of combining geometrical and material modifications in optimizing the acoustic environment.