How to approach roommate about noise during MCAT studying?

Hi all, I am a non-traditional student who has graduated college and is now living in an apartment with a girl who is also a working professional (ie, no longer a student). We have a civil living environment but are not at all close or friends with each other as she is very reserved. Her family is visiting from another country and I am planning to take the MCAT in June, so I am currently studying a lot in addition to working full time. My issue is the noise-level in the apartment... How to approach roommate about noise during MCAT studying?
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