This sound is from Eeyore TTS Computer AI Voice

Eeyore (/ˈiːɔːr/ ⓘ EE-or) is a fictional character in the Winnie-the-Pooh books by A. A. Milne. He is an old, grey stuffed donkey and friend of the title character, Winnie-the-Pooh. Eeyore is generally characterised as pessimistic, depressed, and anhedonic.