www.nrc.gov/docs/ml0037/ml003770903.pdf I was able to find some information about siren standards here. I gave it a brief look and did not find anything specifically mentioning 510 Hz tones. It seems to give a broad range of between 500 to 3000 Hz. It seems the default 560 Hz tone would be compliant anyway. I am not sure why 510 Hz was deemed so necessary. Maybe someone with more understanding of this document could shed some light on it. Quote: 4.5.6.3-15 Frequency of Tonal Signals Center frequencies should be widely spaced within a range of from 500 to 3,000 Hz, although a wider range of from 200 to 5,000 Hz may be acceptable.
The 510/560hz combination is such a treat for the ears!
Where can I find the NRC's siren standards?
www.nrc.gov/docs/ml0037/ml003770903.pdf
I was able to find some information about siren standards here. I gave it a brief look and did not find anything specifically mentioning 510 Hz tones. It seems to give a broad range of between 500 to 3000 Hz. It seems the default 560 Hz tone would be compliant anyway.
I am not sure why 510 Hz was deemed so necessary. Maybe someone with more understanding of this document could shed some light on it.
Quote:
4.5.6.3-15 Frequency of Tonal Signals
Center frequencies should be widely spaced within a range of from 500 to 3,000 Hz, although a wider range of from
200 to 5,000 Hz may be acceptable.
The 510 should really sound like a different siren totally its unreal to here a 510hz a 510hz sound like a for sure a different siren totally its