THE
SOUND OF
CLASSROOM NOISE
IS DISTRACTING
Decibels
20
40
30
50
60
70
80
SAFE NOISE LEVELS
90
100
110
120
HARMFUL NOISE LEVELS 8
35 dB
77 dB
35 %
Average classroom noise levels.2
World Health Organization's recommended ceiling for classroom noise levels.1
Students who feel frustration,
irritation, and annoyance because of bad audio.3