Hearing, unlike speech, develops early in the fetus and is fully functional at birth. It's important to remember that every child is different and approaches developmental milestones at different times. In any case, consult your pediatrician if you have any doubts about your child's development.

Milestones related to speech and hearing

Birth to 3 months

• Reacts to loud sounds with startle reflexes
• He is soothed and calmed by soft sounds
• He turns his head towards you when you speak
• He wakes up to loud voices and sounds
• Smiles in response to voices when spoken to
• He seems to know your voice and quiets down when he hears you

4 to 6 months

• Looks or turns toward a new sound
• He answers "no" and changes his tone of voice
• He imitates his own voice
• Enjoys rattles and other toys that make sounds
• He starts repeating sounds 
• Afraid of loud voice or noise

7 to 12 months

• Responds to own name, phone ringing or someone's voice, even when they are not loud
• Knows words for common things (such as 'cup' or 'shoe') and meanings (such as 'goodbye')
• He makes noises, even when he is alone
• Begins to respond to requests (such as, “come here”)
• Looks at things or pictures when someone talks about them
• Enjoys games like “cuckoo”
• Imitates simple words and sounds
• Can use a few single words with meaning

1 to 2 years

• Follows one-step commands when displayed with a gesture
• He often uses words he has learned
• Uses two to three word sentences to talk and ask for things
• Says more words as each month goes by
• Shows certain body parts when asked
• Understands simple yes-no questions (such as, "Are you hungry?")
• Understands simple phrases (like in the cup or on the table)
• He enjoys you reading to him
• Understands "not now" and "not anymore"
• Sorts things by size (like, big or small)
• Follows two-step commands (such as, “Get your shoes and come here.”)
• Understands many action words (such as run or jump)