Math question
The article says:
"In actuality SPL drops 3 dB for every doubling of the distance from the speaker in small rooms. So if you had a more efficient speaker say 92 db and you are 10 feet from it then the SPL would be 84dB at the listening position."
Is -8 dB @ 10 feet correct?
If SPL drops 3 dB for every doubling of the distance, I would think that it would be -3 dB @ 2 meters, -6 dB @ 4 meters, -9 dB @ 8 meters, etc. That would make 10 feet be about -4.5 dB. Am I missing something?