Re: Hearing safe .338 Lapua suppressors?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RollingThunder51</div><div class="ubbcode-body">I don't own a camel yet but when I do, I'll get a Ma'mun 2000 in Sarsoa for a saddle, as for the seat covers, I'll ride with one Mom made.
No .338 can shooting super sonic rounds is ear safe.
The calculations to determine this is very straight forward.
We take the average dB of the round itself:
.338 is approx 171 dB with a 27" barrel
We subtract the suppression value of the suppressor:
World class suppressor for the .338 come in at 33 - 34 dB
That gives us the dB felt at the operator at approx.
137 dB
Then we figure time exposure limits per 24 hours for that level of sound:
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Reference
A-weighted sound level, dB duration,
in hour per day
_________________________________________________
80................................... 32
81................................... 27.9
82................................... 24.3
83................................... 21.1
84................................... 18.4
85................................... 16
86................................... 13.9
87................................... 12.1
88................................... 10.6
89................................... 9.2
90................................... 8
91................................... 7.0
92................................... 6.1
93................................... 5.3
94................................... 4.6
95................................... 4
96................................... 3.5
97................................... 3.0
98................................... 2.6
99................................... 2.3
100.................................. 2
101.................................. 1.7
102.................................. 1.5
103.................................. 1.3
104.................................. 1.1
105.................................. 1
106.................................. 0.87
107.................................. 0.76
108.................................. 0.66
109.................................. 0.57
110.................................. 0.5
111.................................. 0.44
112.................................. 0.38
113.................................. 0.33
114.................................. 0.29
115.................................. 0.25
116.................................. 0.22
117.................................. 0.19
118.................................. 0.16
119.................................. 0.14
120.................................. 0.125
121.................................. 0.11
122.................................. 0.095
123.................................. 0.082
124.................................. 0.072
125.................................. 0.063
126.................................. 0.054
127.................................. 0.047
128.................................. 0.041
129.................................. 0.036
130.................................. 0.031
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Your 137 dB comes in at less than 20 seconds every 24 hours.
Now you know.....no super sonic .338 Lapua is hearing safe. The values you will take through transmission through your jaw alone will effect your hearing over time. Use a can, plug up. You've been given some great names, YHM not so much.
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Kudos.
Exactly. Use every tool at one's disposal to minimize the exposure no matter what is being fired.
