Noise Health Close
 

Figure 1: RTs ( T30 (250 Hz-2 kHz)) in the virtual classrooms. The settings are based on measurements in a classroom of an elementary school before and after the installation of sound-absorbing materials.

Figure 1: RTs ( T30 (250 Hz-2 kHz)) in the virtual classrooms. The settings are based on measurements in a classroom of an elementary school before and after the installation of sound-absorbing materials.