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NKTBOLT
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Model 5 Decibels at 1 ft

Sun Oct 30, 2016 6:17 pm

Hello everyone, I have a quick question for you. Does anyone know how many decibels a Model 5 is at 1ft? Ive wanted to know for a while, so thanks, Nick.
Very proud owner of a Thunderbolt 1000B Full unit, a fully restored Model 5B, A Full Model 2 Unit, a Model A, a crank siren, and several mini sirens! :TBolt:

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Re: Model 5 Decibels at 1 ft

Sun Oct 30, 2016 7:00 pm

NKTBOLT wrote:Hello everyone, I have a quick question for you. Does anyone know how many decibels a Model 5 is at 1ft? Ive wanted to know for a while, so thanks, Nick.
Are you planning on standing 1 foot away from it while it is running as a dare one of your friends made? :crazy:
Owner of a 1968 10/12 port 3 signal ACA Allertor 125 and too many mini sirens.

connerdstines
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Re: Model 5 Decibels at 1 ft

Sun Oct 30, 2016 7:39 pm

Around 170-200 decibels i would assume. It would definitely mean complete destruction of your hearing without hearing protection.
Down to a Thunderbolt chopper, still a few goofy flashlight-siren combos, and a Model L.

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Re: Model 5 Decibels at 1 ft

Sun Oct 30, 2016 7:58 pm

It's definitely not going to be comfortable. I've had my Model 3 going full bore and I was pretty much next to it, and it definitely wasn't comfortable.
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NKTBOLT
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Re: Model 5 Decibels at 1 ft

Sun Oct 30, 2016 9:49 pm

Stormsetter4 wrote:It's definitely not going to be comfortable. I've had my Model 3 going full bore and I was pretty much next to it, and it definitely wasn't comfortable.
Yes I know, I wound it up more than half way on 240 and it vibrates every atom in my body!
Very proud owner of a Thunderbolt 1000B Full unit, a fully restored Model 5B, A Full Model 2 Unit, a Model A, a crank siren, and several mini sirens! :TBolt:

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Re: Model 5 Decibels at 1 ft

Mon Oct 31, 2016 12:01 am

I can attest to it being quite uncomfortable at even 12 feet away with hearing protection. Mine is quite potent while standing at the back of our lower garage where its controls are mounted; the sound makes everything in there (including my head) vibrate with the sound from it. It's pretty crazy how loud they are at close range like that for being what's considered a fairly "small" siren in terms of comparable sound output. I wish I had a good decibel meter to put in there with me just to see how loud it actually is from my vantage point while it's running.

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Re: Model 5 Decibels at 1 ft

Mon Oct 31, 2016 4:09 am

I was guessing 140 to 150db @ 1 feet, if you assume 109db at 100 feet for the Model 5.

I found this nice little calculator:

http://hyperphysics.phy-astr.gsu.edu/hb ... prob2.html

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Re: Model 5 Decibels at 1 ft

Tue Nov 01, 2016 4:33 am

Uncomfortable is definitely a good description of being next to a Model 5 while it's running.
I was about 4 feet away and I think if I ran the siren for very much longer than I did in my video it would have
resulted in nausea. You can feel your insides moving around when it get's to full speed. Notice the towel on the
Thunderbolt horn blowing in the background while the Model 5 is running.


https://www.youtube.com/watch?v=1xw0xlU-AG8
Proud owner of a garage full of junk.

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Re: Model 5 Decibels at 1 ft

Tue Nov 01, 2016 12:48 pm

CDV777-1 wrote:Uncomfortable is definitely a good description of being next to a Model 5 while it's running.
I was about 4 feet away and I think if I ran the siren for very much longer than I did in my video it would have
resulted in nausea. You can feel your insides moving around when it get's to full speed. Notice the towel on the
Thunderbolt horn blowing in the background while the Model 5 is running.


https://www.youtube.com/watch?v=1xw0xlU-AG8
Wow you are brave. I would stand no closer than 20 feet to a running siren with hearing protection.
Also, I never realized how much air that thing moves... wow.
Owner of a 1968 10/12 port 3 signal ACA Allertor 125 and too many mini sirens.

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