Does he/she hear well?
As from birth to 3 months old the baby
Gets alarmed due to loud noises.
Wakes up to sounds.
Has a blink reflex or a bigger opening of the eyes as a result of noises.
As from 3 to 4 months old the baby
Calms down to his/her mother’s voice.
Stops playing and listens to new sounds.
Looks for the source of new sounds which are not at sight.
As from 6 to 12 months old the baby
Enjoys musical toys.
Gurgles with inflections.
As from 12 to 15 months old the baby
Responds to his/her name and to the word “no”
Fulfils simple requests.
Has an expressive vocabulary of between 3 to 5 words.
Imitates some sounds
As from 18 to 24 months old the baby
Knows the parts of the body.
Has an expressive vocabulary of at least 20 to 50 words; and uses phrases of 2 words.
50% of his/her speech is understood by strangers.
At 36 months old the baby
Has an expressive vocabulary of 500 words; he/she uses sentences of between 4 and 5 words.
80% of his/her speech is understood by strangers.
Understands some verbs.
(Adapted from Northern J, Down M, Hearing in Children. 4th edition. Baltimore, Md: Williams and Wilkins; 1991).