A headset includes a connector configured to couple to a terminal, where the connector of the headset includes at least one functional pin. The headset further includes a sensor circuit and a logic control circuit. The sensor circuit is coupled to a functional pin of the connector of the headset using the logic control circuit. The sensor circuit is configured to sense a wearing status of the headset, and output a trigger signal to the logic control circuit when the wearing status changes. A sensor is added to the headset, and sensor information is fed back to the terminal.