Glossary
S
Sound pressure level at 3 m distance
Sound pressure level at 3m distance in the room with the equivalent absorption area 10 m2 sabin. This level matches to 20 m3 premise with ordinary (rated) noise absorption. Sound pressure should be differentiated from sound power.
SEC Class
SEC class: The EC norm 1254/2014 does not apply if maximum air capacity is >1000 m3/h.
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