How does an automatic door work?

It seems like magic, doesn’t it? You walk towards a door and it opens for you without you doing anything.
Apart from being customer-friendly and welcoming, automatic doors make life easier for disabled people and became very useful during the COVID-19 pandemic.
Self-sliding doors first hit the market in 1960 after being invented six years previously by two North Americans, Dee Horton and Lew Hewitt.
Initially, they were a novelty feature, but they have become more popular along with other technological advances. Automatic doors are especially useful in busy locations, like shopping centres and airports, or during times of emergency, the doors act as crowd management by reducing the obstacles put in peoples’ way. It’s one less thing for us to think about during daily life and provides us with an occasional quick escape when necessary.
Automatic doors often open to the side, with the doors, usually made of glass, sliding across one another. This is a space-saver and reduces the area needed for a door in smaller buildings.
Each automatic door system analyses the light, sound, weight or movement in their immediate area as a signal to open. They have different types of sensors depending on the type of building and where it’s located. A building in a busy street might not suit a door with motion sensors, because it would constantly be opening and closing for passers-by. In this case, a mat or carpet with pressure sensors underneath would be better.
This is all just another reminder of why we shouldn’t close the door on technology!

Consulta nuestros Recursos Gratuitos
de Audio en inglés

Distintos Niveles. Con Trascripción completa

Descarga GRATIS nuestra app de Podcast para aprender Inglés
(para Iphone, Ipad, Ipod y Android).

*Si te ha resultado difícil el ejercicio o
quieres practicar más dispones de más
Ejercicios de Listening de nivel Intermedio.






© La Mansión del Inglés C.B. - Todos los derechos reservados