Here are some examples:
* The baby cried audibly. (The cry was loud enough to be heard.)
* She spoke audibly, even though she was nervous. (Her voice was clear enough to be understood.)
* The music was playing audibly in the next room. (The music was loud enough to be heard from the next room.)
"Audibly" is often used to emphasize that something is indeed audible, especially when there might be a doubt or when it's unexpected.