Can husband HEAR baby?

Ever since we found out we're having our first baby, -at about 3 weeks- my husband has always listened to my belly! He's super excited to hear something! Well last night he was listening and he shot right up and he freaked out and said "oh my gosh I hear it moving around in there!" I said "how do you know?" He said "it's never sounded like this before! It's moving!" So we went back to hear and it was totally silent, then he tapped on my stomach and it started moving again! Lol, according to him! So is it really possible he's hearing the baby? I'll never tell him he's not hearing baby if he actually isn't, it's very cute. This is how he bonds with baby, and it means a lot to him to listen every night.