Have you seen this video?

Athena0809 · February 2012

https://www.bing.com/videos/watch/video/deaf-baby-hears-moms-voice-for-first-time/20cdfon1?cpkey=e904326e-b736-4d0f-a04f-ed1b67e7bfc8%7c%7c%7c%7c

Deaf baby hears his mom for the first time. Watch it and tell me you don't get teary eyed!

I once witnessed a similar case but child due to low income was older when he got hearing aids (close to 2 y.o., maybe), the first time he could hear he heard his mom's voice cracking with emotion saying "I love you" over and over...the entire staff me included were in tears!