Place this as the payoff line in a reaction edit, right after the setup caption, then follow it with a laugh sting or a cough effect to close the bit before you cut back to the main dialogue.
关于此声音
This is an 11-second clip of Herbert from Family Guy singing in his soft, high, wheezy old-man voice. It feels instantly creepy and awkwardly funny, the kind of cheerful serenade that makes everyone listening a little uncomfortable on purpose by design.