What plan does Odysseus devise that will enable him to listen to the song of the sirens yet protect him men from danger?

Odysseus has his men plug their ears with beeswax so they cannot hear the Sirens' song, but he himself is tied to the mast of the ship so he can listen without being lured to his death. This way, he can experience the dangerous allure of the Sirens while ensuring the safety of his crew.