Safe Sound Levels
Safe sound exposure
Exposure Levels (At-Ear) that Produce No More Than 5 dB Noise-Induced Hearing Damage over a 40-Year Period
|
Time Hours |
Days / Year |
Steady (continuous) Noise |
dB(A) Intermittent Noise |
With Margin of Safety |
|
LAeq, 8 hour |
250 |
73.0 |
78.0 |
75 |
|
LAeq, 24 hour |
250 |
68.0 |
73.0 71.4 |
70 |
LAeq = Equivalent continuous sound pressure level
LMax 120dB(A) may cause instantaneous permanent damage to the auditory system