[NSRCA-discussion] db Rules

[Duane Beck]

http://en.wikipedia.org/wiki/Sound_pressure_level#Examples_of_sound_pressure_and_sound_pressure_levels 

I thought 78dB seemed reasonable for a quiet electric park flyer.  It's comparable to a passenger car at 10m, according to that chart.

Duane 

----- Original Message ----- 
From: "Ron Van Putte" <vanputte at cox.net> 
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org> 
Sent: Wednesday, May 20, 2009 11:29:32 AM GMT -05:00 US/Canada Eastern 
Subject: Re: [NSRCA-discussion] db Rules 

That's highly unlikely.  Very few, if any, internal combustion   
engines and even few electric-powered airplanes could meet a noise   
standard of 78 dB at three meters.  The sound pressure level doubles   
every six dB, so 78 dB is 1/8 the sound pressure level of 96 dB.   
That's about the level of a mouse burp. 

Ron