Have the child stand across the room or several feet away. Whisper a
word and see if he can repeat it. Encourage him to try a little more
and to be more quiet; then whisper the same word but no louder. Work
with this exercise, increasing the tone gradually until the child
distinguishes what is said. Then whisper other words and sentences.
This exercise can be lengthened and is excellent for the development of
attention and memory as well as of hearing.