(Sirens) (Cello music) (Doorbell) In contrast, that same region does not respond strongly when you hear perfectly familiar sounds that don't have a clear pitch, like these.
(Sirenas) (Música de violonchelo) (Timbre) En contraste, esa mesma rexión non reacciona así cando oímos sons que nos son familiares que non teńen un ton claro, coma estes: