What you need to understand is that 47 decibels is not loud! Its twice as loud as a refrigerator's hum.
I think the neighbor just needs to get laid. Get laid well. Go ahead give her my number, I'll take one for the team..
Check out this reference:
http://www.ata.org/about-ti nnitus/how-loud-too-loud
http://trace.wisc.edu/docs/ 2004-About-dB/
A cat is also about 45ish decibles, would you be ok with listening to this at 3 am?!