Dose counts this session only. 100% means the full daily allowance is used. Halve the allowance for every 3 dB louder.
Settings
Weighting
Response
Calibration
+100.0
Phone and laptop microphones are not calibrated, so the number is an estimate until you match it once against a real meter or a known sound. Hold a reference meter next to this device, read it, and press the match button. The offset is remembered on this device.
Session
Reference levels
approximate, A-weighted
20 Rustling leaves, a quiet bedroom at night
30 Whisper, a quiet library
40 Quiet office, refrigerator hum
50 Moderate rain, a calm conversation across a room
60 Normal conversation at one metre
70 Vacuum cleaner, busy restaurant
75 Busy street traffic from the pavement
85 Heavy traffic, blender. Limit for 8 hours a day
90 Lawn mower, shouted conversation. About 2.5 hours