You searched for: “capriloquism
capriloquism (s) (noun), capriloquisms (pl)
1. Egophony, or increased resonance of voice sounds, in which the voice has a high-pitched bleating characteristic, like that of a goat: Also known as: bronchoegophony, egobronchophony, tragophonia, and tragophony.
2. Etymology: from Latin caper, "goat", + loquor, "to speak".