Explanation:

- Raucous is an adjective typically used to describe sounds that are loud, harsh, and shrill.

- Option 1: Darken is unrelated. It refers to making something less bright or more obscure.

- Option 2: Praiseworthy means deserving of praise, which does not match the meaning of raucous.

- Option 3: Harsh and shrill accurately describes the raucous sound.

- Option 4: Abandon means to leave behind or give up, unrelated to sound or noise.