u/Bitter_Pay_8389

My 11 month old male cat yeowls for no aparent reason, it's driving me crazy. There's food in the bowl, fresh water, his litter box is clean and he's not in pain because I took him to the vet. He's not neutered yet and we had him for about 10 months now, meaning he lives in our apartment since he was a baby. He is my first cat so i dont really understand whats happening, can somebody give me some advice?