Sound Ratings - Modern-Aire 600 and 1200 CFM internal Blowers Applications

Internal 600 CFM Blower

High Speed     5.5 Sones / 62 dBA

Low  Speed     3.8 Sones / 50 dBA

Internal 1200 CFM Blower

High Speed     5.9 Sones / 64 dBA

Low  Speed     4.0 Sones / 51 dBA

Background Sound Level 39 dBA

Distance 12” Below Filter Intake

A Sone is an internationally recognized unit of loudness. Sones are a linear measure like inches. Doubling the sone value is equivalent to doubling the loudness. To get a sense of what one sone represents, one and a half Sones is equivalent to the sound of a quiet refrigerator in a quiet kitchen.