This version of the goofy ahh sound comes from a Vocaroo voice recording, the kind of quick microphone clip people make to share jokes with friends. The phrase goofy ahh itself is internet slang for anything deliberately silly or clumsy, and short vocal takes like this circulate widely on meme soundboards, Discord servers and short-form video edits. Because it is short, expressive and easy to drop over fails or weird moments, creators keep reusing it as a reusable reaction. Its charm is in sounding homemade rather than studio-made.