User Guide
Page 7
interferes with telephone conversations 85-90 85 dB is the level at which hearing damage (8 hrs.) begins 100 No more than 15 minutes of pain begins around 125 dB *Chart information from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx 5 ... are under 60dB 70 Intrusive; English This decibel (dB) table compares some common sounds and shows how they rank in potential harm to sound over 100 dB of more than 1 minute risks permanent hearing loss 110 -140 Threshold of unprotected exposure recommended for sounds between 90...
interferes with telephone conversations 85-90 85 dB is the level at which hearing damage (8 hrs.) begins 100 No more than 15 minutes of pain begins around 125 dB *Chart information from http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx 5 ... are under 60dB 70 Intrusive; English This decibel (dB) table compares some common sounds and shows how they rank in potential harm to sound over 100 dB of more than 1 minute risks permanent hearing loss 110 -140 Threshold of unprotected exposure recommended for sounds between 90...