Pokemon who possess the Soundproof ability (Pokemon)
Silver Banshee (DC Comics)
Black Canary (DC Comics)
Nagasumi Michishio (Seto no Hanayome)
Spider-Man's stealth suit (Marvel Comics) renders him immune to sound/sonic-based attacks due to being made of omni-harmonic mesh
Unlike the rest of the symbiote Anti-Venom (Marvel Comics) is shown to be strongly resistance against sonic-based attacks. For example, it was capable of withstanding Songbird's sonic-blast with little discomfort.