*2.4.5 Spaces for public announcements*

Airport, public malls, and governmental spaces for individual services are all spaces where public announcement occurs. The announcement of the flight number and timing requires a clearness in the speech to understand the announced information. Otherwise, the disruption and the distraction are the results. Similar results could happen in the public spaces as malls or governmental facilities (**Figure 8**). Acoustic design plays a different role in creating a masking background to clear the pronounced data.
