How to use in-sentence of “hearing aids”:
+ Before hearing aids were invented, people used “ear trumpets” also called ear horns.
+ These first electronic hearing aids were portable but still a little large and were not easily carried around.
+ Microprocessors were created and also added into hearing aids and sound signals were made to be processed digitally.
+ The first modern hearing aids were made in the 17th century.
+ An audiologist can help make hearing aids work even better for a user by customising them.
+ Comparison of Hearing Aids Over the 20th Century.
+ The hearing aids were continued to be made even smaller and in the late 1940s, a device that could fit in the pockets was made.
+ Later in the 20th century, transistors were beginning to be made out of silicon and hearing aids could be made even smaller.
