which of these inventions arose from an attempt to help hearing - impaired people?\no the multiplex…
which of these inventions arose from an attempt to help hearing - impaired people?\no the multiplex telegraph\no the telephone\no the phonograph\no the motion - picture machine
Answer
Brief Explanations:
Alexander Graham Bell, who was involved in work with the hearing - impaired, developed the telephone while working on devices to help the deaf. The multiplex telegraph was mainly for sending multiple messages over a single wire. The phonograph was for recording and playing sound. The motion - picture machine was for creating and showing moving images. None of the latter three were directly related to helping the hearing - impaired.
Answer:
the telephone