This is what we found on Wikipedia regarding the Sound of Patrick:

Patrick Star is a fictional character in Nickelodeon's animated television series SpongeBob SquarePants. He is voiced by actor Bill Fagerbakke and was created and designed by marine biologist and animator Stephen Hillenburg. He first appeared in the series' pilot episode "Help Wanted" on May 1, 1999. In addition to his supporting role on SpongeBob SquarePants, Patrick also serves as the main protagonist of The Patrick Star Show, which premiered in 2021.

An overweight coral-pink starfish, Patrick lives under a rock in the underwater city of Bikini Bottom, and is the best friend of SpongeBob SquarePants. His most significant character traits are his laziness and low intelligence, although he occasionally shows surprising intelligence. Patrick is unemployed and a self-proclaimed expert in the "art of doing nothing".

The character has received positive reactions from critics and fans alike. Patrick has been included in various SpongeBob SquarePants-related merchandise, including trading cards, video games, plush toys, and comic books. He is also a leading character in the three films and stage musical based on the franchise.