An interesting in article posted on dad.ie talks about the need for communication and the use of Lámh by one family in communication.

"A medium such as Lámh minimises the need for second guessing what a person is trying to say as the sign can be immediately recognised if the spoken word is not so, ultimately allowing the person to become more relaxed in their communication, which in itself can often help in producing and pronouncing words more clearly. When using Lámh with Noah, we have started with a few simple signs. Noah and Daddy play with the 'ball' on the floor, Mummy gives Noah something to 'eat' and 'drink' and Noah is a 'good' boy when he takes a mouthful of said food or drink."

Read the full article by Martin Thompson.