Forums: Skydiving: Safety and Training:
Noise levels and noise protection in skydiving

 


Skyper

May 4, 2012, 3:57 AM
Post #1 of 14 (2149 views)
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Noise levels and noise protection in skydiving Can't Post

An interesting research about noise levels and noise protection in skydiving:

Quote:
Skydivers who wear hearing protection (rated class 3 or stronger) are less likely to receive a noise dose higher than 9.73% per skydive and would not exceed his or her noise dose if skydiving 10 times or less within an 8 hour time frame. Alternatively, skydivers who do not wear hearing protection (or hearing protection rated weaker than class 3) are more likely to receive a noise dose higher than 9.73% per skydive and would exceed his or her noise dose if skydiving 11 times or more within an 8 hour time frame.

http://www.myavaa.org/...Penman_JDVAC2011.pdf


Premier skydiverek  (C 41769)

May 4, 2012, 4:05 AM
Post #2 of 14 (2125 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

Do this:

http://www.dropzone.com/...post=4122546#4122546


devildog  (C 40302)

May 4, 2012, 12:26 PM
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

These are what I use. Love em.

http://www.surefire.com/...sonic-defenders.html


Premier skydiverek  (C 41769)

May 4, 2012, 12:31 PM
Post #4 of 14 (1995 views)
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Re: [devildog] Noise levels and noise protection in skydiving [In reply to] Can't Post

In reply to:

Quite low NRR rating...


Skyper

May 4, 2012, 1:48 PM
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Re: [skydiverek] Noise levels and noise protection in skydiving [In reply to] Can't Post

Skydiverek, i use the ones with average of 33dB damping. But, there is one important detail: earplugs must fit well. In other words, if ear plugs are not custom made or made of very soft material which fits well it's damping power is lower than it should be.

I consider now buying the custom made (very expensive) ones.


(This post was edited by Skyper on May 4, 2012, 1:49 PM)


Premier skydiverek  (C 41769)

May 4, 2012, 1:55 PM
Post #6 of 14 (1966 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

Yup, NRR 33 is the highest rating one can get.


Skyper

May 4, 2012, 2:08 PM
Post #7 of 14 (1962 views)
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Re: [skydiverek] Noise levels and noise protection in skydiving [In reply to] Can't Post

Skydiverek, following this research earplugs rated class 3 and higher would be enough for 10 jumps a day. The intensity of sound is very high (up to 115dB), but the duration is very short.

I've been looking for the values for that "class 3 rating" and it appears that it is about 19dB (only).

26dB damping, (which is very close to class 5 rating) would be more than enough, at least following the research results mentioned above.

33dB is usually worn if you work in very noisy environment (above 100dB) 8 hours per day... :)


sundevil777  (D License)

May 4, 2012, 2:40 PM
Post #8 of 14 (1945 views)
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You can get versions that are more effective, but I think they are quite effective enough.


PiLFy  (A License)

May 4, 2012, 4:56 PM
Post #9 of 14 (1911 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

An interesting article. I remember an earlier thread where another audiologist came up w/130db in freefall.


jumpsalot-2  (D 33093)

May 4, 2012, 5:25 PM
Post #10 of 14 (1902 views)
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Re: [PiLFy] Noise levels and noise protection in skydiving [In reply to] Can't Post

Don't any of you people wear a helmet .....Unimpressed...?


PiLFy  (A License)

May 4, 2012, 6:41 PM
Post #11 of 14 (1883 views)
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Re: [jumpsalot-2] Noise levels and noise protection in skydiving [In reply to] Can't Post

In reply to:
Don't any of you people wear a helmet .....Unimpressed...?

Sure...w/earplugs.


ZigZagMarquis  (D License)

May 4, 2012, 7:18 PM
Post #12 of 14 (1876 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

Huh?





Laugh


voilsb  (D 30581)

May 6, 2012, 8:41 PM
Post #13 of 14 (1722 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

This has come up before, and it's been mentioned (and I agree) that these are the best ones on the market: http://www.moldex.com/...plugs/sparkplugs.php


jurgencamps  (D License)

May 7, 2012, 8:08 PM
Post #14 of 14 (1631 views)
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Re: [Skyper] Noise levels and noise protection in skydiving [In reply to] Can't Post

In reply to:
Skydiverek, following this research earplugs rated class 3 and higher would be enough for 10 jumps a day. The intensity of sound is very high (up to 115dB), but the duration is very short.

I've been looking for the values for that "class 3 rating" and it appears that it is about 19dB (only).

26dB damping, (which is very close to class 5 rating) would be more than enough, at least following the research results mentioned above.

33dB is usually worn if you work in very noisy environment (above 100dB) 8 hours per day... :)
Do know that 30 sec exposure to 115 db noise can/will damage your hearing.
More than 8 hr at 85 db will damage your hearing.
+3 db = twice as much noise or half the exposure time before you damage your hearing. To calculate the time you have to take also the time in account that you are sitting in the plane, listening to loud music ...



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