No, "ooh" is not a sound but rather a term used to express feelings or emotions. It is often used when someone is expressing surprise, delight, or distress. It can also be used to show that you agree with something.
Unlike a sound, there is no physical element to ooh - it is a non-verbal vocalization. It is more like a sigh or an expression than a true sound. Ooh is also often used as a sound effect in media, such as movies and cartoons.
When combined with other vocalizations, such as ah, ooh can convey complex emotions, like when someone says "ooh ah!" This could be used to express being pleasantly surprised or feeling awed by something.
So while ooh is not a sound, it is a common term used to express complex emotions.
