In general, the least effective communication strategy between deaf and hearing people is

The least effective interaction methods between hearing and deaf people are lip-reading and voice therapy.

Explanation:

Lecture of speech also uses the term lip reading. Speech interpretation focuses on the lip movement of the speaker and the facial expressions and movements to interpret the speaking.

Another explanation for a hard-to-hear telephone conversation is the absence of a "speak" eye. Rather, everyone with normal hearing utilizes visual signals. You will soon find out how carefully everyone is listening and hearing to understand in a very noisy room. Learning to speak is not a fast and easy therapy.