https://www.techradar.com/news/tap-to-alexa-makes-amazon-echo-show-friendlier-to-the-hearing-impaired

When you don’t have any problems hearing, the Amazon Echo Show is a great device. Its voice-first interface makes sending commands to your smart home a breeze, and it means that Alexa’s always on standby in case you have a desperate need for an answer to an inquiry. 

But, for people who are hearing impaired, using the Amazon Echo Show wasn’t always easy.