6 ms·

https://www.osha.gov/noise https://www.osha.gov/noise Maybe the reference is implied though?

by coolcase 1y ago

formerly_proven 1y ago
That's hilarious, though they do seem to get it right on the other, more in-depth pages.
- throwaway290 1y ago
  Yep, the NIOSH meter app they recommend uses dB(A).
  - radiowave 1y ago
    Though that's still incomplete, because (more of the context stuff that you just have to know already) the "A" here refers to the frequency-weighting scheme used in the measurement, and not to the reference level (which is SPL). It should probably be given as: dB(A) SPL, or dB SPL (A-weighted).
    - formerly_proven 1y ago
      Though that's still incomplete, because (more of the context stuff that you just have to know already) the "SPL" here refers to the reference level in air (20 µPa) and not water or oil (1 µPa). It should probably be given as: dB(A) SPL (1=20 µPa). Though that's still incomplete, because (more of the context stuff that you just have to know already) the 20 µPa only applies at the standard temperature and pressure. It should probably be given as: dB(A) SPL (1=20 µPa, T=293 K, P=101.3 kPa, in standard air). Though that's still incomplete, because (more of the context stuff that you just have to know already) the (A) here is actually the A-weighting curve specified in IEC 61672:2003. It should probably be given as: dB A-weighted (IEC 61672:2003) SPL (1=20 µPa, T=293 K, P=101.3 kPa, in standard air). Though that's still incomplete, because (more of the context stuff that you just have to know already) ... ... The point of communication is to transport information, not pointless pedantry (except for a small subset of the population). Nobody is confused as to what 85 dBA refers to.
      - radiowave 1y ago
        Granted, I should have been clearer about my intended point, which is just the hazard of assuming that the letter(s) after the dB tell you the reference, because sometimes they don't.

https://www.osha.gov/noise https://www.osha.gov/noise Maybe the reference is implied though?

formerly_proven 1y ago

That's hilarious, though they do seem to get it right on the other, more in-depth pages.

throwaway290 1y ago
Yep, the NIOSH meter app they recommend uses dB(A).
- radiowave 1y ago
  Though that's still incomplete, because (more of the context stuff that you just have to know already) the "A" here refers to the frequency-weighting scheme used in the measurement, and not to the reference level (which is SPL). It should probably be given as: dB(A) SPL, or dB SPL (A-weighted).
  - formerly_proven 1y ago
    Though that's still incomplete, because (more of the context stuff that you just have to know already) the "SPL" here refers to the reference level in air (20 µPa) and not water or oil (1 µPa). It should probably be given as: dB(A) SPL (1=20 µPa). Though that's still incomplete, because (more of the context stuff that you just have to know already) the 20 µPa only applies at the standard temperature and pressure. It should probably be given as: dB(A) SPL (1=20 µPa, T=293 K, P=101.3 kPa, in standard air). Though that's still incomplete, because (more of the context stuff that you just have to know already) the (A) here is actually the A-weighting curve specified in IEC 61672:2003. It should probably be given as: dB A-weighted (IEC 61672:2003) SPL (1=20 µPa, T=293 K, P=101.3 kPa, in standard air). Though that's still incomplete, because (more of the context stuff that you just have to know already) ... ... The point of communication is to transport information, not pointless pedantry (except for a small subset of the population). Nobody is confused as to what 85 dBA refers to.
    - radiowave 1y ago
      Granted, I should have been clearer about my intended point, which is just the hazard of assuming that the letter(s) after the dB tell you the reference, because sometimes they don't.