When doctors treat deafness with hearing aids, can the devices be considered a form of speech therapy?

In the US, many people with hearing loss can use hearing aids to communicate.

But a growing number of researchers are using them to treat deaf patients.

Some are calling the technology speech therapy.

This is the second in a series of Recode segments exploring what it means to use speech therapy in deaf people.

Today: What is speech therapy, and how do people use it?

Recode senior writer Kara Swisher spoke to the people who are using it.