GMAT Strategy

Hi everybody - I am a new member in this community. I have been studying for 2 weeks now and have been making great progress ... especially in math as I showed some significant, initial weaknesses in my first few attempts 2 weeks ago.

I was hoping somebody could help me with the below (and seemingly odd) question. I have gone through many questions since starting my prep ... but have developed a habit to use earplugs (the plastic kind that you roll up and stick in your ears) in order to cancel out noise when doing practice tests. Before I develop a real dependency I would like to understand whether we are allowed to take earplugs into the test center.

Appreciate any insight you guys can offer. BTW this is a great website. I have recommended it to all co-workers who are planning to take the GMAT in the future.