Level 1 Cannot sustain phonation. This speech sample demonstrates the inability to control pitch. Fluctuations or breaks appear to cover almost the full range of audible tone generation.

The pitch of the speaker's voice is rated on a five-point scale to indicate how well the speaker can produce voice which has an appropriate pitch for the age and sex of the speaker. Ratings of 4, 3, ...

These birds have neurons that are activated when they produce specific vocalizations, similar to how neurons are activated in humans, though in a different region ...

A region in the auditory cortex involved in processing sound, now shown to play a role in speech melody interpretation. Traditionally, scientists have believed that prosody – a term describing pitch ...