Abstract
To improve a room's acoustic parameters there have been studied several variants of acoustic materials and devices that can be placed on the ceiling of the hall. The main objective of the study was the reverberation time measurement and calculation. By using the acoustic panel made from polystyrene, covered with jute on the both sides, has ensured the largest reverberation time decrease. Thus, we can say that the analyzed room can be used for speech activity (courses, conferences etc.)
Highlights
The speaking halls used in special for oral communication, must ensure the best possible conditions so that the words emitted by the source are collected by the receiver in an more understandable way [1,2,3].Reverberation time is the main parameter that can express the acoustic quality of a room [4]
The reverberation time measured was in a narrow range of values, (0.77 ÷ 1.96) seconds, based on the six analyzed frequencies
The reverberation time was analyzed for different materials (Table 1) assembled in panels form (Figure 4)
Summary
Reverberation time is the main parameter that can express the acoustic quality of a room (it is an objective parameter) [4]. To determine the calculated reverberation time in a room the most frequently used formula is the W.C. Sabine empirical formula: T60 =. Where: V represents the room volume; 4m∙V – air absorption (m is the air absorption coefficient); Abtot– overall sound absorption of the room. The 4m∙V factors are related to the air absorption from the room and can be ignored for small rooms. In these cases, the reverberation time can be determined by the equation [7, 8]: T60 = 0.16∙V = 0.16∙V (2)
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