Medical schools will not look at your application until it is complete. This means your AMCAS has been verified, your secondary fee has been paid, your secondary has been sent in, your LORs have been received and you do not have an outstanding MCAT test date.
According to the Centers for Disease Control and Prevention, noise exceeding 90 decibels will feel loud to the ears. If movie theaters keep the volume at the proposed level, the amount of sound would be similar to the noise produced by heavy city traffic. In comparison, rock concerts today can peak at volumes of 110 decibels and greater.
There is no fixed size. The size of the screen is proportional to the size of the room, and rooms can be designed to fit 60 viewers or 2000 viewers. The range is huge. I have been in shoebox theaters; 1980s multiplexes that are built around screens 25 feet wide.