adjective / adverb
loud
LOUD/laʊd/
Strong enough in sound to force attention.
The bell is so loud that an adult nearby covers both ears.

Etymology
Old English hlud described noise from voices and musical instruments. The selected sense continues this acoustic use, describing a sound or its source as strongly audible.
In context
This noise does sound loud, so I can see why you would think it comes from a big animal. But this animal tricked you, Squeaks!
More examples
- A loud crash wakes everyone in the house.
- Please don't talk so loud while the baby is sleeping.
- The music gets louder as we approach the stage.
Forms
loud · louder · loudest
loudly adverb — With a high volume of sound.
loudness noun — The degree of volume a sound has.