User's Guide

17
3. Enable threshold alarm and set threshold value as 65 dB.
4. Reboot the device.
Appendix
Sound Level Guidelines
It’s recommended to maintain environmental noises below 70 dBA over 24 hours (75 dBA over
8-hours) to prevent noise-induced hearing loss.
Source
Sound Pressure Level (dBA)
Threshold of hearing
0
Breathing
10
Rustling leaves
20
Whispering
30
Quiet library or residential area
40
Quiet office
50
Normal conversation
60
Busy traffic, normal radio
70
Noisy restaurant
80
Heavy truck, hair drier, power tools
90
Subway train
100
Construction noise
110
Rock concert, thunder
120
Threshold of pain
130
-END-
ff060a00008a02
Channel
Type
Value
ff
06 (Set Threshold Alarm)
8a 02=>02 8a = 650
650/10=65 dB
ff10ff
Channel
Type
Value
ff
01 (Reboot)
ff (Reserved)