Huma-Air MOD50 Moderator Insert Avalance- High Power Startmodule

[BlackTitanium]

A few months ago, I purchased the Huma-Air MOD50 Moderator Insert Avalance- High Power Startmodule and two 40mm Modules.

There were no instructions included, or available anywhere. I installed them in several configurations, and the product seemed to make the gun louder, not any quieter.

Would like to know the experience others have had with this product?

My setup:
EDgun Leshiy 2 REPR / .177 (4.5mm)/ 250mm
Huma-Air MOD50 Moderator
Regulator: 120 bar

 

[MikeVV]

I would assume...
That just like the rest of the Huma inserts in their completed suppressors, they need to be wrapped !
Per the Huma notes -
Each of the 3 chambers has encapsulated aramid (Kevlar) reinforced fabric by way of an internal metal wire mesh for perfect sound absorption

This is, I think one major thing that makes a difference over other brands. The thickness of the material, and the quantity of wraps, around the inserts. Huma uses a thicker material, and also applies more turns of material than most or all other suppressors.

And yeah...before you ask...call or e-mail Huma to find out how to acquire the material.

Mike

 

[BlackTitanium]

I would assume...
That just like the rest of the Huma inserts in their completed suppressors, they need to be wrapped !
Per the Huma notes -
Each of the 3 chambers has encapsulated aramid (Kevlar) reinforced fabric by way of an internal metal wire mesh for perfect sound absorption

This is, I think one major thing that makes a difference over other brands. The thickness of the material, and the quantity of wraps, around the inserts. Huma uses a thicker material, and also applies more turns of material than most or all other suppressors.

And yeah...before you ask...call or e-mail Huma to find out how to acquire the material.

Mike

The product description states “They replace the default Kevlar and wired inserts…”.
My understanding is that “replace” means, that the Kevlar Wrap is not used with the Avalanche inserts.

 

[bink2]

The product description states “They replace the default Kevlar and wired inserts…”.
My understanding is that “replace” means, that the Kevlar Wrap is not used with the Avalanche inserts.

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Hey Blacktitanium: I'm doing the same as you . I"m trying my MOD50 on a 30 cal M3 compact and a caiman X as far as the avalanche inserts they only
go and fit one way that being the O ring seals against the next chamber. Not the camber it sits in, if you look you'll see, took me a bit of testing.
Marc from Team HuMa-Air suggested this: start replacing the shorter chambers first and starter last I believe the avalanches are more a air stripper.
I'm now in the rearranging /testing mode on the caiman, So far so good. the real test will be the M3 Hope this helps

 

[BlackTitanium]

Hey Blacktitanium: I'm doing the same as you . I"m trying my MOD50 on a 30 cal M3 compact and a caiman X as far as the avalanche inserts they only
go and fit one way that being the O ring seals against the next chamber. Not the camber it sits in, if you look you'll see, took me a bit of testing.
Marc from Team HuMa-Air suggested this: start replacing the shorter chambers first and starter last I believe the avalanches are more a air stripper.
I'm now in the rearranging /testing mode on the caiman, So far so good. the real test will be the M3 Hope this helps

Thanks for your input bink2!

I figured out the O-ring and one way orientation of the Avalanche inserts right away.
I tried all of the configurations that you mentioned.

Using my iPhone with the NIOSH Sound Level Meter App as a reference, the MOD50 moderator registered quieter with the default Kevlar/Wire inserts, than with any configuration implemented with the Avalanche inserts.

 

[MikeVV]

The product description states “They replace the default Kevlar and wired inserts…”.
My understanding is that “replace” means, that the Kevlar Wrap is not used with the Avalanche inserts.

View attachment 294093

View attachment 294094

Interesting.
Why would they do that ? There is nothing to dampen the sound, except the volume of the can ! While I am fairly new at this, I don't see a higher powered gun is going to get much in the way of any...sound damping, without something to actually do that work.
On a lower powered gun, yes, I've seen just volume work to dampen the sound, but in my experience, it doesn't work for higher powered guns.

If I had an M50, I'd wrap the baffles (with...something). It IS...a pretty simple experiment to do !

Mike

 

[OldSpook]

Interesting.
Why would they do that ? There is nothing to dampen the sound, except the volume of the can ! While I am fairly new at this, I don't see a higher powered gun is going to get much in the way of any...sound damping, without something to actually do that work.
On a lower powered gun, yes, I've seen just volume work to dampen the sound, but in my experience, it doesn't work for higher powered guns.

If I had an M50, I'd wrap the baffles (with...something). It IS...a pretty simple experiment to do !

Mike

Probably not enough clearance?

... and while I am at it ... no more insulting PMs thanks ...

 

[bink2]

Thanks for your input bink2!

I figured out the O-ring and one way orientation of the Avalanche inserts right away.
I tried all of the configurations that you mentioned.

Using my iPhone with the NIOSH Sound Level Meter App as a reference, the MOD50 moderator registered quieter with the default Kevlar/Wire inserts, than with any configuration implemented with the Avalanche inserts.

So far, the best arrangement for the caiman X has been starter=avalanche next 3= factory felt, in second place, with a 1db difference Stater=avalanche, next F. felt 3rd =avalanche 4th =Felt I use 3 purpose built sound meters, [ no phones] shooting a 4-shot string [4 shots 3 meters =12 reading] then I average all
readings.
I realize NOT a perfect set up. I and others did notice that it changes the sound so much it doesn't sound like an air gun at all! Next the M3

 

[BlackTitanium]

So far, the best arrangement for the caiman X has been starter=avalanche next 3= factory felt, in second place, with a 1db difference Stater=avalanche, next F. felt 3rd =avalanche 4th =Felt I use 3 purpose built sound meters, [ no phones] shooting a 4-shot string [4 shots 3 meters =12 reading] then I average all
readings.
I realize NOT a perfect set up. I and others did notice that it changes the sound so much it doesn't sound like an air gun at all! Next the M3

Interesting. Thank you!
Are you testing via dry fire or live fire? Just curious because there is a difference in sound shooting with/without pellets.

 

[bink2]

Interesting. Thank you!
Are you testing via dry fire or live fire? Just curious because there is a difference in sound shooting with/without pellets.

I test with pellets, gives me a good reason to shoot I did mess up and dry fire and it was at least 1.5 dBA louder. [I use the A weighting]
Caiman X w/Humma=83.2 dBA with Shogun=82.5 HW110 factory mod=77.9. The meters are set up 3ft left of me and about 1 ft.
forward. I was hoping the Huma would get it close to the HW110 level, misses the mark on that But again it does change the sound
and the little rifle is pushing lots of air, so for me that's a pulse. What are you putting this on?

 

[BlackTitanium]

I test with pellets, gives me a good reason to shoot I did mess up and dry fire and it was at least 1.5 dBA louder. [I use the A weighting]
Caiman X w/Humma=83.2 dBA with Shogun=82.5 HW110 factory mod=77.9. The meters are set up 3ft left of me and about 1 ft.
forward. I was hoping the Huma would get it close to the HW110 level, misses the mark on that But again it does change the sound
and the little rifle is pushing lots of air, so for me that's a pulse. What are you putting this on?

My setup:
EDgun Leshiy 2 REPR / .177 (4.5mm)/ 250mm
Regulator: 130 bar

I did a little testing today, Stock Kevlar/Wire vs the Polymer Avalanche inserts in the start chamber, two sets of 8 shots for each.
The average db (LAeq) readings were both around 62db, but there was a different tone between the Kevlar/Wire and Polymer Avalanche inserts.

 

[bink2]

WOW 62 db That is whisper quite Heck I though my HW 110 at 77.9 was/is whisper. It is cool the way the tone is changed.
So out of curiosity what set up are you going to use?

 

[BlackTitanium]

WOW 62 db That is whisper quite Heck I though my HW 110 at 77.9 was/is whisper. It is cool the way the tone is changed.
So out of curiosity what set up are you going to use?

I’m giving the Avalanche start module a go for awhile.

 

[BlackTitanium]

Sound comparison, recorded by Blink Outdoor Camera, of the HUMA-AIR MOD50 Moderator, Stock Kevlar wrapped wire insert vs. Avalanche CNC Polymer insert installed in the MOD50 start module.

Very close in measured decibel, but a different tone can be observed.

 

[OldSpook]

Pretty sure you are more interested in the instantaneous (maximum or peak) value than the average.

 

[BlackTitanium]

Pretty sure you are more interested in the instantaneous (maximum or peak) value than the average.

Thank you!

 

[OldSpook]

Thank you!

https://www.noisemeters.com/help/faq/min-max-peak/ Hope that helps. Had to look it up myself.

 

[bink2]

https://www.noisemeters.com/help/faq/min-max-peak/ Hope that helps. Had to look it up myself.

Good info thanks I always use the A setting [=dbA]

 

[tefloncoated]

@BlackTitanium - hey man, was just wondering how your experiment with the inserts on the MOD50 was going. Did you settle on a preferred configuration that gives a noticeable (especially to your own ear, rather than just pure dB numbers) improvement?

From my experience, the inserts will give a better relative result on a higher power set up. The wrap material dampens the sound on a lower-medium power set ups since there is not a lot of air being moved and it moves at lower speeds. I think of "dampening the sound" as getting more of a 'thump' or lower pitch of the report, vs general volume reduction. On higher power set up you generally need more expansion volume to lower the report (dB) of the shot since you are pushing more air and at higher speed. Otherwise some of it will likely escape before it gets absorbed by wrap material. So at high power set ups, the wrap may actually result in a louder (relative) report.

 

[BlackTitanium]

@BlackTitanium - hey man, was just wondering how your experiment with the inserts on the MOD50 was going. Did you settle on a preferred configuration that gives a noticeable (especially to your own ear, rather than just pure dB numbers) improvement?

From my experience, the inserts will give a better relative result on a higher power set up. The wrap material dampens the sound on a lower-medium power set ups since there is not a lot of air being moved and it moves at lower speeds. I think of "dampening the sound" as getting more of a 'thump' or lower pitch of the report, vs general volume reduction. On higher power set up you generally need more expansion volume to lower the report (dB) of the shot since you are pushing more air and at higher speed. Otherwise some of it will likely escape before it gets absorbed by wrap material. So at high power set ups, the wrap may actually result in a louder (relative) report.

I have since added a 3rd Module, and settled on using the Avalanche-High Power Startmodule.
This, so far, seems to sound the best to me.
Seems to be quiet enough, based on shooting rats from my bedroom window, at night, doesn’t wake up my wife.

Last night I missed a shot, the rat wasn’t alarmed by the shot, and I was successful at getting a second kill shot.
My wife said that she didn’t hear anything.

After reading your post, I tried adding the Avalanche insert into the 1st 40mm module and then both the 1st and 2nd 40mm module after the Startmodule.
The sound meter showed a 1 db drop with each module that was changed out, a total of 2db decrease with both High Power inserts installed.

It seemed like an audible improvement, until I went and tried shooting from my 2nd floor bedroom window.
I noticed a high ping tone, as the shot echoed between my and the neighbors house.
I didn’t’t like that tone, so I removed the two High Power inserts from the two 40mm modules, and I reinstalled the wrap inserts.


Window view of the pest targeting area:

Leshiy 2 Hornet, with 3rd 40mm Module installed: