PCA SDR

It will be at the Autox Chairs discretion which cars are excessively loud, Each Driver will be warned on a case by case basis and we will try to work with you to find a solution to the problem. We will be working on a new testing procedure at the 4/17/2010 ax. so bear with us. See you there

Outstanding! Well done.

I think most of us are reasonable people. I think most of us could identify the top 3 loud cars at an event. I would also like to believe that if we designated one of our gentle, soft spoken, persuasive members to be the "sound cop" that they could approached the owner of a loud car and reasoned with them so that they would, in the spirit of the club, agree to make the necessary changes. Maybe maybe if we could "fix" the 3 loudest cars we could then work on the next 3, if there are any.

I understand that some want hard and fast criteria, but after much discussion it seems like this is not easily obtainable. So I vote that we try the "soft" approach first, at least as an interim solution.

We all know which cars are loud, so lets just reason with them to fix it.

(Maybe even refund the entrant fee the first time they are asked to not run.)

I would like to be able to find out how loud my car is EVEN if it isn't over the limit. Would this be possible?

As one of the DE chairs, I was happy to hear (no pun intended) that the consensus of the board meeting was that we are really only worried about the really loud cars that make it impossible to even hear the PA system. Stock and moderately modified cars should have no problem passing the sound test.

So, come on down to the next autocross
Of course, get ready for the DE at Qualcomm

To paraphrase Supreme Court Justice Potter Stewart
I CAN’T DEFINE TOO LOUD, BUT I KNOW IT WHEN I HEAR IT

gocart wrote:I would like to be able to find out how loud my car is EVEN if it isn't over the limit. Would this be possible?

YES WE AIM TO PLEASE

Sounds good! (pun intended)

I am betting that the highly calibrated and extreeeemly accurate "Starter Cringe & Attempt to cover Their Ears" device will be a vital part of the monitoring system.

PROPOSED: That a driver who has a "suspected"/"aledged" too-loud car be required to stand next to the Starter while another driver he designates drives his car from the start line. This procedure will be repeated as many times as is necessary until the driver agrees that his car is "too loud".

Some hints that your car might be too loud:
* All timing activity in the trailer ceases until you are at least 200 feet down the track away from us
* We can hear your car from the other end of the Stadium over the noise of closer cars
* The Corner Workers call in and say "I thought there was a noise limit here?" as you go past
* Your car is audible over the radios when Corner Workers try to call in cones, and you aren't close to that station
* A radio call is interrupted with "Wait until [your name here] is past - I can't hear you."

Most, sometimes all of these, happen at each AX.

I wonder if everyone knows just how loud 93 db is...
78 db is the level at which long-term exposure can cause hearing damage, 100 db is the sound of a jackhammer from 3 feet away (or 3-93 db cars at 50 ft!), 120 db can cause immediate hearing damage, and 130 db is the point at which physical pain usually occurs.

I keep reading about, "You can tell how loud a car is when it leaves the start". This is not accurate, as some cars can leave at a higher RPM as others, giving the perception they are louder.

I can hit 4-5K RPM's...side step the clutch at the start which sounds louder than a 911 that cannot do the same type of start.

A meter on the track is the correct way to do it, not standing at the starting line.

John