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Earplugs for high frequencies

post #1 of 10
1/1/11 at 7:43am
Thread Starter 

I wonder if anyone here is familiar with earplugs that have an uneven isolation response - like foam earplugs - but to a lesser degree. I am looking for high isolation above 2khz or so and as little isolation below it. Alternatively, is there a really cheap active noise cancelling alternative? I need to still hear work mates. Thanks.

 

I mean, I could get customs with low isolation overall, but it'd be less than ideal.


Edited by MrGreen - 1/1/11 at 7:55am
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post #2 of 10
1/1/11 at 10:01am

The only thing I can recommend is a pair of musicians earplugs. I have a pair of Hearos Extended Wear plugs that I use when I play with my band. They claim an even attenuation and they're rated for 10dB. You can get them online for about $15.

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post #3 of 10
1/1/11 at 10:44am
Thread Starter 

I've already got custom earplugs with high isolation. The problem is that all of the acoustic energy I wish to nullify is above 2khz, and reducing the vocal range is not desirable.

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post #4 of 10
1/1/11 at 11:00am
Quote:
Originally Posted by MrGreen View Post

I've already got custom earplugs with high isolation. The problem is that all of the acoustic energy I wish to nullify is above 2khz, and reducing the vocal range is not desirable.


You do realize that 2kHz is right at the center of human vocal range?

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post #5 of 10
1/1/11 at 11:03am

http://www.hearingprotection.co.uk/index.php?option=com_content&task=view&id=141&Itemid=278

 

http://www.hearingprotection.co.uk/index.php?option=com_content&task=view&id=74&Itemid=145

 

Custom filters perhaps.

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post #6 of 10
1/1/11 at 11:05am
Thread Starter 
Quote:
Originally Posted by ClieOS View Post

Quote:
Originally Posted by MrGreen View Post

I've already got custom earplugs with high isolation. The problem is that all of the acoustic energy I wish to nullify is above 2khz, and reducing the vocal range is not desirable.


You do realize that 2kHz is right at the center of human vocal range?



Um, no. Talking is more like 100 to 300hz. Diction harmonics are about 1k to 6k.

 


 

Quote:
Originally Posted by Anaxilus View Post

http://www.hearingprotection.co.uk/index.php?option=com_content&task=view&id=141&Itemid=278

 

http://www.hearingprotection.co.uk/index.php?option=com_content&task=view&id=74&Itemid=145

 

Custom filters perhaps.



MM12 looks good. Any idea for universal options? As I'd really rather not get another custom. Also less than 5db attenuation down low would be more ideal than 15

 

Edit: Wow, that sonic valve protector thing looks interesting. Thanks for the link

 

Edit::: Damn, the etymotic universal equivalent of it is $500.

 

 

I think I'll give a shallow E.A.R insertion a go instead. Nevermind


Edited by MrGreen - 1/1/11 at 11:27am
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post #7 of 10
1/1/11 at 11:45am
Quote:
Originally Posted by MrGreen View Post

Um, no. Talking is more like 100 to 300hz. Diction harmonics are about 1k to 6k.

 

 


True. But you need to consider general human hearing is most sensitive in the 1kHz to 5kHz region, where the harmonic are. These harmonic help to 'make up' the fundamental and make voice easier to recognize.  Cut off a big chunk of around 2kHz and above, then you will need people to rise their voice - which I assume is the problem you are facing?

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post #8 of 10
1/1/11 at 12:02pm

There are active noise canceling shooting earmuffs designed to let only voices through.

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post #9 of 10
1/3/11 at 11:48pm
Quote:
Originally Posted by nikongod View Post

There are active noise canceling shooting earmuffs designed to let only voices through.


Usually they only deal w/ low registers I thought.  Do they bother w/ the upper freqs as well?

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post #10 of 10
1/3/11 at 11:53pm
Thread Starter 

I ended up modifying the ER20s, it works well enough (although voices are hard to hear at a large distance). I punched a number of holes in the triflange. The effects are minimal, but good enough since I don't like using EAR plugs (which would probably work even better). I'll buy a fresh pair of ER20s again later.

 

 

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