How loud is your moderator?

[Woodworm1972 24]

With the use of an iPhone app I measured the sound of my gun and then the gun with moderator fitted, both dry fired.

 

The results were 86db without and 82db with moderator!

 

Just wondered how that compares with others?

 

Phone was held v near muzzle

[sako 23]

What's the iphone app? I'll test an air ranger with AM custom gunsmiths mod (think it's a twink).

[Rake aboot 4,935]

My moderator is loud as f**k,, his names Malt!! he is always banging on in ma lug,, moanin aboot somit!!!

[Woodworm1972 24]

It's called "db volume" Sako

 

No doubt not the best way to test, but needs must

[matt_hooks 188]

Firstly, what were the parameters of your test? Distance from the muzzle? In front/behind/to the side? Which side? The iPhone mic is designed to pick up speech level sounds, and at the normal speech frequencies, so will probably not be very efficient at picking up percussive noises.

 

Also, firing without a pellet will make a big difference to the sound signature. The pellet will cause the discharged air to be slower, so will often have a lower impulse level.

 

A 4dB decrease is almost 25% less sound, so quite a big decrease. Of course 82dB is still quite loud.

Edited March 27, 2012 by matt_hooks

[Woodworm1972 24]

My moderator is loud as f**k,, his names Malt!! he is always banging on in ma lug,, moanin aboot somit!!!

 

Lol

[Woodworm1972 24]

Firstly, what were the parameters of your test? Distance from the muzzle? In front/behind/to the side? Which side?

 

Also, firing without a pellet will make a big difference to the sound signature.

 

A 4dB decrease is almost 25% less sound, so quite a big decrease. Of course 82dB is still quite loud.

 

We're talking about 2" bud

[matt_hooks 188]

Sound volume decreases in an inverse relationship to the distance, so the further away you are, the lower the noise level. It is an inverse square relationship (due to the energy dissipation over a circular area) and so sound level decreases very rapidly. Try the experiment again, but with the phone 12" to the side of the barrel, and then 12" in front of the barrel. It'll show you how the sound is reduced with distance, and how it projects towards the target, which is the most important thing.

[Woodworm1972 24]

Ive since tuned the gun which no doubt invalidates my first test.

 

Will complete a series of further tests when time allows, average it out to gauge it better Matt.

 

Had a look at the twink moderators, ill have to check whether they fit my s300 barrel, the one on mine isnt up to much in both looks and performance!

 

I'm fairly certain it's clipping!

[sako 23]

Im not sure how accurate that app is but thought it would be fun trying. My air ranger is in the red with and without mod (from a couple of inches to replicate your first test). Both readings seemed simular, around 95db but without the mod it sounds like a shotgun so was expecting a bigger reading difference between them so Im a little dubious of the accuracy of the app.

[Woodworm1972 24]

I agree Sako, I was mainly curious as to how loud it was.

 

Chris

[ryan666 64]

only noise from my rapid is from the action notshot mod seen to that

[Daz 7 563]

Same Here Ryan Bud Nutshot 10 inch Carbon Whispering Death.

[ryan666 64]

to true daz...just need to shut the action up now and the bunnys will not know whats hit them

[Extremetaz 15]

Sound volume decreases in an inverse relationship to the distance,

 

does this mean that it gets louder the farther away you are?... ('pologies - couldn't resist)

 

It is an inverse square relationship (due to the energy dissipation over a circular area)

 

Spherical area surely - which would make it cubic, no? (I don't know the forumulae so I'm genuinely asking, not trying to be a smartass this time. )

 

 

In any case - I'll take a measurement this weekend of the HW100 FAC .177 & the HW100K .22, but it'll be with a Nexus S so I'm not sure how much bearing you could put on it. I've no doubt mind that anyone taking the measurement with the same incarnartion of the iPhone should get equivalent results (assuming consistant test patterns, re: phone placement, of course) - in order for that Siri thing to work, the uniformity of the production would have to be spot on .

Edited March 28, 2012 by Extremetaz