[NSRCA-discussion] Noise rules

[patterndude at comcast.net]

Plus or minus 6 db depending on environment.  That variability is the problem.


--
District 6 AVP 
www.aeroslave.com

-------------- Original message -------------- 
From: "Joe Lachowski" <jlachow at hotmail.com> 

> >From what I measured a quite a while ago, I believe the equivalent at 25 ft 
> to that at 10ft is about a 7db difference. 
> 
> 
> >From: "Lance Van Nostrand" 
> >Reply-To: NSRCA Mailing List 
> >To: "NSRCA Mailing List" 
> >Subject: Re: [NSRCA-discussion] Noise rules 
> >Date: Wed, 21 Jun 2006 22:53:36 -0500 
> > 
> >I'm not sure if there may be a perception that measuring at 25 feet is 
> >somehow more palatable than at 10 ft. If this is the feeling in your club 
> >then go for it. However, I know from experience that all influences on the 
> >measured result (wind, hard/grass, fences, proximity to a covered pit echo 
> >chamber, cars, etc) are exponentially amplified with distance. I measured 
> >the same Extra330 with a large gas engine in every way possible and found 
> >the results varied from 101-105 db. This is a huge variation. 
> >Upwind/downwind in about 10 mph winds is worth 2-3 db. At 10 ft the 
> >variation was from 102-103 db. If you have a guy with a plane near the 
> >limit he may argue your measurement result. If you say the lmit is the 
> >highest value measured then you are really restricting some guys with loud 
> >planes to less than the nominal. If you provide leeway, then your limit is 
> >effectively raised. It opens a can of worms. 
> > 
> >Lance 
> > ----- Original Message ----- 
> > From: Glen Watson 
> > To: 'NSRCA Mailing List' 
> > Sent: Monday, June 19, 2006 10:52 PM 
> > Subject: Re: [NSRCA-discussion] Noise rules 
> > 
> > 
> > Links below are to a RC club in the Houston market who implemented a 
> >noise standard.. My club has adopted the same standard. In 2004 we had 
> >complaints from a nearby neighbor regarding noise. Since implementing this 
> >noise standard we've had zero complaints. 
> > 
> > 
> > 
> > http://fortbendrc.com/ 
> > 
> > 
> > 
> > http://fortbendrc.com/Field/Field%20Noiselevel.htm 
> > 
> > 
> > 
> > Regards, 
> > 
> > 
> > 
> > ~Glen 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> >------------------------------------------------------------------------------ 
> > 
> > From: nsrca-discussion-bounces at lists.nsrca.org 
> >[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Ferrell 
> > Sent: Monday, June 19, 2006 8:09 PM 
> > To: NSRCA Mailing List 
> > Subject: [NSRCA-discussion] Noise rules 
> > 
> > 
> > 
> > If someone out there has a set of noise rules for a general purpose RC 
> >club? Especially a set that works. 
> > 
> > 
> > 
> > I cannot expect the masses to conform to pattern numbers, but I need 
> >something to start with. "Reasonable" does not seem to mean the same thing 
> >to every one. 
> > 
> > 
> > 
> > 
> > 
> > John Ferrell W8CCW 
> > "My Competition is not my enemy" 
> > http://DixieNC.US 
> > 
> > 
> > 
> >------------------------------------------------------------------------------ 
> > 
> > 
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> 
> 
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