[NSRCA-discussion] Noise rules

[Joe Lachowski]

>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" <patterndude at comcast.net>
>Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>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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