AAC Silencer Shoot 2009

This one. I was at the 2006 shoot.

H2OMANs_MK14_SEI_Mod_0_with_SEI-Fisher_suppressor.JPG


How are you getting suppression numbers less than 139 dB with the gas system venting to atmosphere? I did some work with a suppressed piston driven AR15 and could never get the thing to go under 142 dB on Al Paulson's meter. Who is doing your sound testing and what equipment is being used?

A 22" barreled M14 with a 10-12" long can on it is an unwieldy beast. The OAL of an M14 is 46". With the can we are in the 56-58" range which is darn near five feet long.
 
What M14 and what suppressor did you sample?

This one. I was at the 2006 shoot.

H2OMANs_MK14_SEI_Mod_0_with_SEI-Fisher_suppressor.JPG

Really?

I don't recall meeting you at that shoot and I certainly don't recall giving you my suppressed MK14 to sample.


Did you have your Al Paulson's meter set up incorrectly behind me while I performed that demonstration?

The device is designed to sit just to my left as pictured below...

silencerapril2008044.jpg
 
I was at John's shoot in 08 as well.

I didn't shoot your M14 but I stood next to it while it was being shot. I used to have a TRW M14 and really liked it so I was quite interested to see how they perform suppressed.

I am well aware of how silencer sound testing is performed. I have done it with both John and Al on several occasions. Just wondering how you are seeing numbers less than 140 dB with a gas system that dumps excess pressure to atmosphere? And how you are measuring your sound reductions? The vast majority of people have no idea how it is done properly.
 
I didn't shoot your M14 but I stood next to it while it was being shot.



The performance of any suppressor is measured down range in front of the weapon. Hiding the location of the rifleman from the target and
those near the target is what the suppressor is all about. I fired about 300 rounds at the 2006 shoot without hearing protection and had zero
ill effects. This experience would put the dB at or below the hearing safe limit of 139 dB.


Suppressed-MK14-SEI-USN-Mod-0.jpg



.
 
Last edited:
The performance of any suppressor is measured down range in front of the weapon. Hiding the location of the rifleman from the target and those near the target is what the suppressor is all about.

Suppressor sound testing protocol is governed by MIL Std 1474D. If you are not testing to this standard then your "data" is utterly meaningless and NOBODY will take you seriously. The test protocol stipulates the sound meter is placed one meter to the left of the silencer muzzle and 1.5 meters above grass to prevent reflections.

In the past there was a notorious US suppressor manufacturer who claimed 40 dB sound reduction for every product in every caliber. This was performance way beyond what anyone else could achieve at the time. He did this by placing the sound meter 100 yds downrange, which was just a way to fudge the sound data to make his products look better. Due to public and industry ridicule this manufacturer no longer does crap like that. I'd suggest you consider doing the same.

I fired about 300 rounds at the 2006 shoot without hearing protection and had zero
ill effects. This experience would put the dB at or below the hearing safe limit of 139 dB.

No it wouldn't. The limit for hearing damage is considerably lower than the pain threshold. You are doing damage to your ears long before you feel pain or are able to perceive that damage. Hearing damage builds up over time and may not be evident for years but that doesn't mean it is not happening. You are simply fooling yourself out of ignorance of the facts. I'd suggest some reading is in order. Start with Al Paulson's Vol 1 then contact Phil Dater for his pamphlet on sound testing silencers. I believe Phil also has a bunch of information concerning hearing damage from impulse sound.

You are basing your observations at the shooter's ear which, being well behind the suppressor muzzle, is subjected to much less noise than the sound meter which is perpendicular to the suppressor muzzle. As a manufacturer looking to be taken seriously you should be well aware of all this. That you clearly are not, very much surprises me.

So even if you are correct and the noise signature is 139 dB at the shooter's ear, that means the SPL at the muzzle is 6-8 dB louder. Meaning your can is LOUD in comparison to the current industry standards for .30 silencers.

I have sound tested a suppressed, piston driven AR to the MIL Std 1474D requirements and can assure you no piston driven system is going to go below 139 dB because a certain amount of high pressure gas is being vented to the atmosphere instead of going through the silencer.

The 18" MK14s and 22" M14 EBR that I shoot suppress below 139 dB...
much quieter than a SCAR-H and reportedly quieter than the M110.

Now, as we determined that you have not properly sound tested your suppressors to any standard, how do you justify making such claims?
 
No ill effects means just that - no damage & no pain.

Telling us that you stood next to me while I was firing my rifle and concluding the suppression was
roughly 142 dB is utterly meaningless and NOBODY will take your shooter's ear measurement seriously.

You didn't sample my rifle during the 2006 shoot as you have stated and your claims are baseless.

Suputin, maybe you should get yourself an M14 and an SEI/Fisher sound suppressor, run your tests and
publish your results here for all to see. Others do this and I suggest that you do the same. This would be
far more credible than your off the wall comments and guesstimations.

One more thing... I am not a manufacturer, I don't work for any manufacturer and I'm selling anything.



.


.
 
No ill effects means just that - no damage & no pain.

And you clearly have no clue how hearing damage occurs and the long term effects of cumulative hearing damage. I worked as a Health & Safety Manager for a large multinational company for several years so I have a background in the prevention of hearing loss. Your qualifications are ........ ?

You had audiometric testing done before and after to prove no hearing damage? Cause that is the only way to know for sure.

Telling us that you stood next to me while I was firing my rifle and concluding the suppression was roughly 142 dB is utterly meaningless and NOBODY will take your shooter's ear measurement seriously.

I know you are but what am I? Maybe try a more constructive and adult form of rebuttal and people might be willing to listen to your argument.

I never made any kind of SPL claim. Only said I stood next to one being shot and was less than impressed. I have a lot of experience with various silencers and calibers and am reasonably well qualified to decide when a can's performance is decent or not. I would never try to assign a sound level based on hearing a can but I know a loud can when I hear it.

You didn't sample my rifle during the 2006 shoot as you have stated and your claims are baseless.

I "sampled" it as much as anyone could. Standing beside a suppressor is a much better indicator of that can's performance than being behind the trigger because it is much closer to the position of the sound meter. Again, didn't make any kind of claim other than to say I was less than impressed. You are the one making baseless claims of 139 dB when you haven't even sound tested the thing properly.

Suputin, maybe you should get yourself an M14 and an SEI/Fisher sound suppressor, run your tests and publish your results here for all to see.

I had an M14 years ago and am not really all that interested in having another. Not really all that interested in having a loud suppressor either so I think I'll forgo the suggestion.

This would be far more credible than your off the wall comments and guesstimations.

Interesting. I quote the published MIL Std and associated scientific factors involved in the testing based on personal experience and this is apparently some kind of "off the wall comments and guesstimation". You go around making s**t up out of thin air and your numbers are somehow concrete data?

Might suggest you cut back on the drinking or caffeine or whatever drugs you are currently on.

Look, I know what it is like to try to create these things and all your hopes that they work well. I have gone through this lots of times myself. But the reality is sometimes an idea doesn't work no matter how much time you spent creating it or how cool you think it is and you have to let that go, get over your own ego and decide to make something better next time. The sound meter is a harsh teacher but she never lies and ultimately she will show you the way to real performance.

Fooling yourself with bulls**t in order to pump up your own ego will NEVER lead to worldclass sound performance. You can tell yourself, "my can is better" a thousand times but that isn't going to change reality.

I'm not trying to be a #### about this but you are making baseless claims here and needed to be called on it because the vast majority of guys on this forum don't know any better.
 
I'm not trying to be a #### about this but you are making baseless claims here and needed to be called on it because the vast majority of guys on this forum don't know any better.

You are failing at trying not to be a #### and it is you that is making baseless claims.

You are the one that needed to be called out - you should be ashamed of your childish actions.
 
FYI, Suputin is a Sound Suppressor SME, he has tested a bunch, as well as designed several world class suppressor designs.

He is laying out the specs for sound testing.

No piston gun will be as quiet as a DI gun, unless they have a means of stopping venting of muzzle gasses into the atmosphere.
 
FYI, Suputin is a Sound Suppressor SME, he has tested a bunch, as well as designed several world class suppressor designs.

He is laying out the specs for sound testing.

No piston gun will be as quiet as a DI gun, unless they have a means of stopping venting of muzzle gasses into the atmosphere.

Kev... slightly off topic but... any idea when those Double Taps will be ready to ship?

Thanks
Mark
 
He is laying out the specs for sound testing.

I am simply relaying the requirements layed out by the military and perfected by people smarter than me.

Hey Kev, question for you. As we all know generally muzzle brakes make crappy flash hiders and flash hiders make crap muzzle brakes. Does that uber wizzy Triple Tap of yours reduce flash as well as recoil?

I suspect it does as a result of some of those structures being reminiscent of how a certain silencer puts out the internal flames.

Care to enlighten me?
 
Back
Top Bottom