Related milestones

Is not upset by everyday sounds

Reacts to sudden noises or sounds

Listens and responds when spoken to

Generally happy when not hungry or tired

Able to calm with rocking, touching, and gentle sounds (at 4-6 months)

Enjoys a variety of movements (at 4-6 months)

Begins to use consonant sounds in babbling, e.g. “da, da, da”

Uses babbling to get attention

Makes different kinds of sounds to express feelings