Yes, but I have the impression a lot of people who never came into contact with some kind of audio/hearing theory have no clue about that, so I think it is bett

Yes, but I have the impression a lot of people who never came into contact with some kind of audio/hearing theory have no clue about that, so I think it is better to write it explicitly. Mainly because people who don't know what SPL means can just go and look it up, also learning comething, instead of remaining clueless and using dB as-is treating it as some absolute quantity.