There are many types of hearing aids (also known as hearing instruments), which vary in size, power and circuitry.
There are many different types of hearing aids as shown in the "different hearing aids," image on this page.
There are many different types of hearing aids as shown in the "different hearing aids," image on this page.
このテキストを簡略化してください: There are many types of hearing aids (also known as hearing instruments), which vary in size, power and circuitry. 出力: