But can hear your voice from week 14, so you can start singing yourself :)
Babys can not hear from out side the womb until 23 weeks
I'm 11weeks & 3 days And I Started Putting Music To My Belly At 9weeks
I'm 15 weeks here and I'm already putting music on my belly. I listen to Phil Collins, Seal, and easy stuff like that. I think as long as your not playing Marilyn Manson or anything harsh like that you will be good.