How do you write the sound a ghost makes?

The sound a ghost makes is often represented as "boo" or "whooo," conveying an eerie, haunting tone. This onomatopoeic expression captures the essence of a ghostly presence, evoking a sense of mystery and fright. Other variations might include whispers or soft moans, depending on the context. Ultimately, the choice of sound can vary based on cultural depictions and individual imagination.