JTS Professional Co Ltd SIEM-2T User Manual
ATTENTION
Please pay high attention to the following information.
Sound Level (dB)
Duration per day (hrs)
The guideline published by Occupational Safety Health
Administration (OSHA) in United States indicates
overload volume level for prolonged listening may harm
your hearing. Here below are referenced data
on maximum time exposure to sound level before
hearing injury occurs.
90
92
95
97
100
102
105
110
115
8
6
4
3
2
1.5
1
0.5
0.25
140
Avoid or injury may occur