Sound Law for 2010

[PJ-Hunter]

New sound law for 2010. I just got this info in the mail today from Colorado State Parks

Any OHV made before 1998 must be at or under 99db
Any OHV made after 1998 must be at or under 96db

I have the SLP pipe setup with and HPS can and I had it measured. I measured at 83db and I haven't lost any horsepower because my sled isn't loud. Imagine that.

 

[tudizzle]

New sound law for 2010. I just got this info in the mail today from Colorado State Parks

Any OHV made before 1998 must be at or under 99db
Any OHV made after 1998 must be at or under 96db

I have the SLP pipe setup with and HPS can and I had it measured. I measured at 83db and I haven't lost any horsepower because my sled isn't loud. Imagine that.

you don't have loud pipes so how could you know what your missing!!! Monster stickers + loud pipe= pro sledder...didn't ya know!?!

 

[milehighassassin]

I don't know where I can get mine measured but I plan on taking the keep it on the DL approach. Keep the revs low and don't be a poser in the parking areas. If you don't act like an idiot they will hopefully leave you alone.

 

[tudizzle]

I don't know where I can get mine measured but I plan on taking the keep it on the DL approach. Keep the revs low and don't be a poser in the parking areas. If you don't act like an idiot they will hopefully leave you alone.

oh great.............I'm fawked!

 

[PJ-Hunter]

When they test you they aim a sound meter at your exhaust outlet and have you hold the brake and rev to 4000rpm.

XC's turbo doesn't have a silencer and he measured at 89db.

 

[sidewinder84]

That seems strange because yours was pretty dang loud when I heard it haha. Maybe its just that much worse when you open up your exhaust valves. Thats good though, if yours passes mine should

 

[Zachcreek]

New sound law for 2010. I just got this info in the mail today from Colorado State Parks

Any OHV made before 1998 must be at or under 99db
Any OHV made after 1998 must be at or under 96db

I have the SLP pipe setup with and HPS can and I had it measured. I measured at 83db and I haven't lost any horsepower because my sled isn't loud. Imagine that.

I basically have the same setup on my M8. I'm worried about hurting the Bunny's and Squirrels ears..

 

[milehighassassin]

When they test you they aim a sound meter at your exhaust outlet and have you hold the brake and rev to 4000rpm.

XC's turbo doesn't have a silencer and he measured at 89db.

Yeah, but that turbo sitting on the exhaust creates plenty of noise silencing (and back pressure).

 

[Wonder Bread]

My stock motor, stock pipe, MBRP can 800 Doo made 88.8 db at 4000 rpm during the test.

 

[Zachcreek]

So a two cycle has a higher freq than a four stroke. So my question is, with the different freq range, will the two stroke seem louder than the four stroke at the same rpm, but register a lower DB. Lower freq travel farther and have a greater impact to sound pressure. (Equal Loudness Contours). Is the Forest Service using sound pressure meters, Vu or (?) for these tests.

Here are some examples of genaric readings.

Threshold of hearing
0 dB

Motorcycle (30 feet)
88 dB

Rustling leaves
20 dB

Foodblender (3 feet)
90 dB

Quiet whisper (3 feet)
30 dB

Subway (inside)
94 dB

Quiet home
40 dB

Diesel truck (30 feet)
100 dB

Quiet street
50 dB

Power mower (3 feet)
107 dB

Normal conversation
60 dB

Pneumatic riveter (3 feet)
115 dB

Inside car
70 dB

Chainsaw (3 feet)
117 dB

Loud singing (3 feet)
75 dB

Amplified Rock and Roll (6 feet)
120 dB

Automobile (25 feet)
80 dB

Jet plane (100 feet)
130 dB

 

[Ex-Member]

^ That's the beauty of acoustic measurements... same goes with RF measurements. Environment makes a big impact on the measurement error, whether you're around trees or rocks, snow level/density, how the measure it (Pressure vs. intensity), last time the meter was calibrated (Lab cal, not field cal), ambient temperature....

...And yes, frequency will affect the level. If you have a sound source that can produce a constant amplitude over a range of frequencies, the receiving meter will display different readings over the range... any transducer will work better on a small range of frequencies than others, so theoretically yes, two sleds could be the same sound level but read differently due to variations in frequency.

If I ever get a ticket for this, I will fight it... probably win too... joys of test engineering...

 

[Dogmeat]

I'm still LOL @ Mule's "Loudest Can" idea hahahahah

 

[MtnDoo]

Bear taking a dump on the woods.
96 dB

 

[GYP M-80]

Bear taking a dump on the woods.
96 dB

Bahahaha

 

[Zachcreek]

Doo, that again will be determined by the size of the dump and the context. A bear in Minnesota where the relative humidity is higher than Colorado, will greatly affect the range of what can be heard and measured.

Black Bears will also affect the reading with the ingestion of Berry's and basically a vegetarian diet. On the other hand, Grizzly bear readings will be much different with the presence of bells and the odor of pepper spray.

I hope this clears thing up a little better.

 

[Mnt bound]

Doo, that again will be determined by the size of the dump and the context. A bear in Minnesota where the relative humidity is higher than Colorado, will greatly affect the range of what can be heard and measured.

Black Bears will also affect the reading with the ingestion of Berry's and basically a vegetarian diet. On the other hand, Grizzly bear readings will be much different with the presence of bells and the odor of pepper spray.

I hope this clears thing up a little better.

Now that is funny. Seriously has anybody had a slp can tested?

 

[GunniApexRider]

Those numbers are 10 dB higher than what I was quote buy our local jonny law dawg mike just a few months ago. He basically said if it ain't stock he would be writing a ticket.

If you have ever run into this guy you know what to expect, guilty until proven innocent.

 

[MtnDoo]

GAR - Mike lives and works by his own set of rules. He tries to make laws fit in places they're not intended to.

Funny thing is he was relentlessly harassing two clients of a local real estate agent who had taken some prospective clients out for a ride. He was trying to get this fella's clients to concur that they were being "illegally commercially guided" by the real estate agent.
They finally told him to piss off and he gave up.

There's got to be a whole body of thinking on how law enforcement engages the public and what results from that interaction.
And from what I saw from "Mike" at our club meeting you'd expect him to start ticking people for cussing in the parking lot.

If I had a nickel for every time I heard him say: "If they do XYZ, I'm going to ticket them for it!"
You'd honestly think he was working on a 100% commission basis.

As far as the dB level: I think it's a crock of schidt. They need to limit other sources of "noise pollution" as well then such as rifles, private jet airplanes, heavy machinery, Toyota Prius Factories, grape gravy, etc. I can't believe CSA President supported this legislation. Sometimes we're our own worst enemy.

 

[XC700116]

Those numbers are 10 dB higher than what I was quote buy our local jonny law dawg mike just a few months ago. He basically said if it ain't stock he would be writing a ticket.

If you have ever run into this guy you know what to expect, guilty until proven innocent.

yep they're 10db higher than what they told me, PJ, wonderbread, mule, and a host of others the day we got "practice checked". with those numbers we are all in the clear.

I am still lookin for a good muffler for my turbo though as it is still on the obnoxious side of my taste. BD has one but it's like $350 for a muffler that only lowers it 4 db.

 

[PJ-Hunter]

Those numbers are 10 dB higher than what I was quote buy our local jonny law dawg mike just a few months ago. He basically said if it ain't stock he would be writing a ticket.

If you have ever run into this guy you know what to expect, guilty until proven innocent.

Yep. They changed it. Would you like me to scan the flyer that I received in the mail by State Parks? I am not making this chit up. What they told us when at the research sound check was that they were collecting data to see if changes needed to be made. Apparently adjustments were needed, hence the 96db limits. But as Mule stated, if given a ticket, there are enough holes in the testing that it cannot be 100% accurate, one could beat the ticket every time.

BTW, sounds like Johhny Law down in Gunnison is a classic azzlown! My sled is definitely not stock and it comes in WELL below the initial 89db limit!