[nothacking_]

Except finding '-45 dB' is frustratingly common. Have a look at this random microphone datasheet from DigiKey: https://www.sameskydevices.com/product/resource/cmm-3125at-4...

They do state the test conditions "at 94 dB SPL, 1 kHz", but don't specify the units attacked to the actually measurement. It's given as a ratio to an unspecified quantity.

[formerly_proven]

Thanks, it's a good example for this bad practice. Especially because this could reasonably be both dBu and dBV, so it's actually ambiguous. (On the other hand with that tolerance the difference between the two is not that significant)