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I didn't get that reading the article. The author acknowledge that ratios are useful, but that there are specific problems in how we use this unit and how we pi
by remram 1y ago
I didn't get that reading the article. The author acknowledge that ratios are useful, but that there are specific problems in how we use this unit and how we picked and express the reference scales.
> On the face of it, the idea makes sense.
Your specific example is a pure ratio so there's no problem with it (there is no reference). Apart from the fact that I have to guess whether you are measuring volts or watts through your cables, of course...
- BenjiWiebe 1y agoSo what I learned today, via another comment and confirmed with a dictionary, is that decibels (unspecified reference) is NOT pure ratio - it's a _power_ ratio. So it will be Watts, not Volts.
- bitdivision 1y agoBut that's why it's so confusing. Did they purposefully leave off the reference to indicate Watts, or did they mean volts (as I'd guess audio engineers typically do when talking about amplifiers).
- BenjiWiebe 1y agoNo, it isn't Watts if there's no reference. It's a ratio of powers. i.e. amplification or attenuation. To have an actual amount of power, you need to reference it to some particular amount of power, like dBm for power-ratio-relative-to-milliwatt.