correctness of power of ISO test files

[MDudaie]

First, thanks for this repository and work!
we are trying to test the ISO, and we found that when you read the WAV files that are included in the ISO, which says 40 or 60dB etc. you are multiplying the power by 2sqrt(2), which we can understand, but we're not sure why the ISO have files that are not in said power, maybe you can help us understand?

thanks a lot