I fel like i am in a similar pisition so watching this thread with great interest. In particularlyhave to avoid low frequency noise alot of which is impact noise , as @Sizzle
discussed. , from shared walls and some from heating or plumbing. Low frequency noise is very hard to block.
the neighbors tv travels thru ceilings and walls And by tine it enters here its all low frequency and he seens to always up the bass on his tv. Its not that its echoing around indont think but is true sonehow manages to get into every single room
. ive read that building a room within a room may bE one of best ways to block low freq noise. Also shoujd to be suspended If possible and with drop ceiling. Even if i hired soneone tho not sure can be done here
also read about putting Thick moving blankets on wall. Reviews on amazon tend to say they reek , so woukd create new issue
an an anology ive seen is when soundproofing to thinknof it lije blocking water- if there are any holes it will get in that way.
im looking for someone who cwn overse this all if anyone knows places- someone who wil consult with sound engineer then suggest non toxic things...then do the work I cant even hammer a nail.
i bought bass traps but i dont find them to do much good
noise cancelling head phones give me “ear suck”. If your sister tokerates them its a great option but not for unexpected noise
one other thing your sister might do well with is to put a matress in a walk in closet. I do that. Right now not Helping enough because there are nEw Active neighbors On other side but worked greet for a couple of years - and being both very close to ground in an enclosed space and have a door within reach while laying down to open or close the perfect anount had positive benefits on my other symptoms too. Also theres no windows and its a controllable space.
has she ever tried gabapentin?
fo Posting that info cwil chrck out link. Its awesome you got them to agree in a rental.
so hard to find a good handyman too