Anyone on Moparts own
one of the precision noise sources to calibrate dBA sound level meters,
or a recently calibrated meter?
I am looking for someone to measure the sound level of some Chrysler horn at a set distance away
so I can use it to do a rough calibration.
Looking online I have seen that locomotive horns have a dBA sound level standard from 100 feet away,
and aftermarket horn manufacturers give specs
https://www.law.cornell.edu/cfr/text/49/229.129https://autoquarterly.com/best-loud-car-horns/https://www.chem.purdue.edu/chemsafety/Training/PPETrain/dblevels.htmI am trying to roughly check the accuracy of the free noise app for iPad/iPhone from the National Institute for Occupational Safety and Health.
https://www.cdc.gov/niosh/topics/noise/app.htmlDo some of the automobile magazines routinely measure vehicle interior noise levels?