Rocking toddler...

Hi. I have a two year old. She’s a rocker, like a really hard rocker so hard I can here her all the way downstairs in my bedroom that’s threw the floor and she’s on the other side of the house! What can I really do to to not prevent so to say but to sound proof the noise and make it easy to sleep with what she’s doing!! I have a newborn on the way that will be sleeping down here with us and the noise of the rocking is too much especially with a newborn who will be trying to rest along with tired parents :/ PLEASE helpp