I Am Alexander Graham Bell is an episode of Xavier Riddle and the Secret Museum.
Losing his voice is frustrating enough for Brad, but it doesn't help matters when Xavier and Yadina do all the talking for him instead of trying to listen. To the Secret Museum! Brad takes his friends back in time to meet someone who worked his whole life to help people be heard: Alexander Graham Bell. Watching Alexander first help his deaf mother, then his whole school of deaf students, have their voices heard in any way they can, helps Xavier and Yadina realize that they should've tried harder to listen to Brad, even when they couldn't technically hear him. It's important to listen to everyone.