Miyabi--be sure to check out the LSAC policies online before the big day! I'm afraid it's a no-go on the ear plugs.
From LSAC (emphasis added):
Prohibited devices. Candidates are not permitted to bring
into the testing room the following devices: ear plugs,
books, papers of any kind, calculators, rulers, listening
devices, cellular phones, recording or photographic
devices, pagers, beepers, headsets, and/or other electronic
devices. Supervisors are instructed to collect all prohibited
devices that are brought into the testing room until the
exam is finished. LSAC and LSAT testing staff will not be
responsible for confiscated devices.