Comparing multiple meters on the same test subject. At this time I am not certain the "official measurement" at the contest is good, but it is what is taken to be standard. I find the RS meter to be a very good tool, and at a very good price. John Ferrell http://DixieNC.US ----- Original Message ----- From: "Tom" To: Sent: Monday, April 26, 2004 12:15 PM Subject: Re: [OT]:Sound meter calibration > How have you determined that your meter readings are 3db off? > Tom > > At 12:10 PM 4/26/04 -0400, you wrote: > >I use a Radio Shack DB Meter for sound measurement of competition model > airplanes. It works pretty well for relative measurements but seems > occasionally be off by as much as 3db from the "official sources". A > commercial calibration device is available, but is beyond what I am willing > to spend. > > > >The range of interest is about 90-100db, A weighted. > > > >I would appreciate any thoughts on construction of such a device. The PIC > relationship is optional! > > > >John Ferrell > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads