My 2yr old is very quiet at daycare?

At home my 2& 1/2 year old is very talkative, fun, outgoing...... She has no problems n her development. At daycare on the other hand she seems to be quiet, shy, bashful. Even her tone of voice changes (very quiet/low). It is a home daycare w/ only 4 kids ranging from 1,2, & 4 yr old kids. The lady seems nice but does loud voice, so it can seem like she's giving orders. I do trust her btu i cant figure out why my little girl doesn't express herself @ daycare?? Any suggestions? And what should i bring up to the daycare director when speaking to her about this?