![]() These types of equipment exist in all schools and can generate high levels of background noise that influence overall noise levels in a typical classroom. Air conditioning ducts, equipment, and units.There are numerous sources of noise at a school as you can see in the graphic below:Įquipment noise can come from sources like: When determining the decibel level of noise in a typical classroom, we need to take into account inside and outside noise. Woodworking shop (with background noise from power tools) - 78-90 dB.School kitchen (including background noise from machinery) - 67-80 dB.Music class with students talking - 68-73 dB.School break bell in the hallway (measured 2 meters away) - 115 dB.2 children arguing over toys - 78-82 dB.11 unruly students doing group work - 60-65 dB. ![]()
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