Sensitivity Analysis of Acoustic Parameters in a Theatre Hall: A Case Study of the Maria Zankovetska Theatre in Lviv

This article explores the potential for modifying acoustic parameters within a theatre hall, using the MariaZankovetska Theatre in Lviv, as a case study. The study used sensitivity analysis to evaluate how changes inthe sound absorption of specific surfaces affect selected acoustic parameters in the horseshoe-shaped theatrehall. A numerical model of the hall is developed and calibrated based on in-situ acoustic measurements toassess the sensitivity of parameters such as reverberation time (T20), early decay time (EDT), clarity (C50),and early sound strength (G80). The analysis reveals that surfaces such as the stage tower ceiling, stage walls with curtains, audience walls,and seating have the most significant impact on the acoustic parameters. Modifying the sound absorption ofthese surfaces can affect T20, EDT, C50, and G80. Notably, increasing the absorption of a single surface mightnot significantly alter C50 and G80 values, whereas reducing the absorption of surfaces such as seating canlead to noticeable changes in these parameters. These findings provide valuable insights for future renovationsand acoustic adjustments, aiming to optimize the theatre’s acoustic performance while preserving its historical character.