Interpreting Results — Normal Mode
LED	Dose %	Risk Factor	Hearing Protection Needed
green (slow flash)	< 25%	No risk of hearing loss	NO
green (fast flash)	25%	No risk of hearing loss	NO
green	50%	1/2 daily dose reached	NO
yellow	100%	Limit of permissible exposure	YES
red	200%	2x allowable daily dose	YES	Muffled hearing and ringing in the ears are likely after unprotected exposure.
red	400%	4x allowable daily dose	YES
red	1600%	16x allowable daily dose	YES
red	3200%	32x allowable daily dose	YES

Interpreting Results — Quick Check (2-minute test)
If the LED color is:	The estimated dose per hour is:	The estimated dose per 8 hours is:
green (slow flash)	< 25%	< 200%
green (fast flash)	25%	200%
green	50%	400%
yellow	100%	800%
red	200%	1600%
red	400%	3200%
red	1600%
red	3200%

Time to Reach 100% Dose
	% Dose Per Hour	% Dose 8 Hours		Time (hours) to Reach 100% Dose
Level (dBA)			No EP	ER-9	ER-15	ER-25	ER-20
85	<25 (12.5)	100	8	24	24	24	24
88	25	200	4	24	24	24	24
91	50	400	2	16	24	24	24
94	100	800	1	8	24	24	24
97	200	1600	30 min	4	16	24	24
100	400	3200	15 min	2	8	24	22 (est)
103	800	6400	7.5 min	1	4	24	14 (est)
106	1600	12,800	3.8 min	30 min	2	20 (est)	7 (est)
109	3200	25,600	1.9 min	15 min	1	10 (est)	3.5 (est)