How Do They Do It?

Hearing Aids, Trains

Documentary May 2, 2022 20 min iTunes

Available on Investigation Discovery, Food Network, Science Channel, Discovery, TLC, Travel Channel, HGTV, Prime Video, discovery+, Hulu, Sling TV, Max, Animal Planet, Philo, AHC GO, Destination America GO, Discovery Life GO, Cooking Channel

S16 E19: Hearing aids are produced that are nearly invisible and connect wirelessly to phones, TVs and stereos. Also, see how trains are built for London's new underground railway and how actors are crafted for one of the world's oldest art forms, shadow puppetry.

Documentary May 2, 2022 20 min iTunes

TV-PG

Information

Released: 2022
Run Time: 20 min
Rated: TV-PG

Languages

Original Audio: English
Audio and Subtitles: English (United States) (AAC, CC)

Accessibility

: Closed captions (CC) refer to subtitles in the available language with the addition of relevant non-dialogue information.