There could be a long list of reason she hears more in her room...start with the her floor and supporting structure sit on a foundation and your room/floor sit on the wall structure.. ...walls you both share, etc, etc...
1) what is she hearing ....voices ...talk level or screaming? Furniture noises?
2) what type of structure is it? Age
3) What type of floors do you have ..tile /carpet hardwood.
4) What type of doors ...hollow core, etc.