15Sound DataSound DataSound Pressure LevelModel Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall(dBA)NoiseCriteria125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHzAWM07LWHigh 31 32 33 28 26 14 6 34 28Med 25 29 28 24 19 9 5 29 22Low 20 26 24 20 11 8 6 25 18AWM10LWHigh 30 33 33 32 28 17 8 35 31Med 26 29 30 27 21 11 7 30 25Low 19 25 25 21 14 6 6 25 19AWM15LWHigh 41 39 39 38 36 26 14 42 38Med 38 36 37 34 32 22 10 39 33Low 30 30 31 28 23 12 7 32 26AWM20LWHigh 37 38 38 39 33 22 11 42 38Med 33 35 35 35 29 17 8 38 34Low 29 33 32 31 23 12 7 34 30AWM25LWHigh 42 42 42 42 40 31 21 46 42Med 37 38 39 38 34 24 13 42 37Low 34 35 36 35 30 20 9 39 34*AWM301WHigh 42 46 45 44 41 35 28 49 43Med 40 45 44 43 38 33 27 47 42Low 37 43 43 40 35 30 26 45 39Microphone position: 1m in front and 0.8m/*1m below the vertical centre line of the unit.Model Speed 1/1 Octave A-Weighted Sound Pressure (dBA), ref 20μPa Overall(dBA)NoiseCriteria125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHzACK020AW/AWHHigh 46 45 40 38 32 21 14 42 37Med 44 43 37 33 28 18 12 39 32Low 43 42 35 31 26 17 11 37 31ACK025AW/AWHHigh 48 46 43 39 33 27 19 45 38Med 45 43 40 35 29 21 15 42 35Low 43 42 38 32 27 19 14 40 33*ACK030AW/AWHHigh 50 48 47 43 37 35 28 49 42Med 48 45 43 38 32 31 27 45 38Low 46 43 41 35 30 30 26 43 36*ACK040AW/AWHHigh 50 49 49 46 39 38 31 51 45Med 48 47 47 43 36 34 25 48 42Low 46 45 46 41 34 30 23 46 41*ACK050AW/AWHHigh 54 52 51 48 43 42 34 53 47Med 52 50 50 46 41 40 32 52 46Low 51 49 49 45 39 39 31 50 45Microphone position: 1.4m/*1.5m below the face center of the air return of the unit.