Sound Level meter requirements

[Dean Pappas]

To begin with, John was right in identifying the RS meter as best used for comparative measurements.
Back when "making the noise" was difficult and always hairy-edge, we all calibrated our RS meters (there is a trim pot) to agree with the AMA meter at the one place that mattered: the noise limit spec. 
First it was 105, then 98, then 96. If all you have is a meter that's correct at the limit, then you can deal with the rest.
Regards,

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Del K. Rykert
Sent: Wednesday, February 16, 2005 1:02 PM
To: discussion at nsrca.org
Subject: Re: Sound Level meter requirements


I had a friend calibrate  my R.S. meter. it was off 2dB. Not inferring that it is best meter. Just they can be adjusted. How well it hold the adjustment I have no  clue.
 
    Del
 

----- Original Message ----- 
From: Bob Richards <mailto:bob at toprudder.com>  
To: discussion at nsrca.org 
Sent: Wednesday, February 16, 2005 8:45 AM
Subject: Re: Sound Level meter requirements

Good point.
 
For my use (making comparisons) the RS meter is fine. The club I formerly belonged to also used them for enforcing a club-imposed noise limit.
 
However, if it comes down to enforcing a local noise ordinance, a calibrated meter traceable to NIST would probably be required. I'm not sure, but I don't see why you would not be able to have a RS meter calibrated, although I am sure the measurement uncertainty would not be very good. I'm sure the calibration would probably cost more than the RS meter.
 
What are/were the circumstances of "needed in a court of law" are you referring to?
 
Bob R.

Lance Van Nostrand <patterndude at comcast.net> wrote:

Earl/John,
Our club bought a RS meter and I remember Gray taking it to a contest where 
either Earl or Mike Harrison had their Extech. The RS meter was 2 db off 
and had no calibration. We then bought the Extech and found that the 
calibration ability and the specs are needed in a court of law.
--Lance



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20050216/32ce8dde/attachment.html