A system capable of reducing noise generated in a process of plugging or unplugging an earphone, the system comprising a terminal and an earphone, wherein the terminal comprises: an earphone socket that complies with a standard, said standard also defining a corresponding standard earphone plug, wherein the earphone comprises an earphone plug that does not comply with said standard, wherein the terminal further comprises a switch circuit, an earphone power supply circuit, and a bleeder circuit, wherein the earphone socket comprises a first pin and a second pin, the switch circuit comprises a control pin, an input terminal, a first output terminal, and a second output terminal, the first pin of the earphone socket is connected to the control pin of the switch circuit, the second pin of the earphone socket is connected to the input terminal of the switch circuit, the first output terminal of the switch circuit is connected to the earphone power supply circuit, and the second output terminal of the switch circuit is connected to the bleeder circuit; wherein the bleeder circuit is configured to reduce a difference between voltages passing through an audio-left channel or an audio-right channel of the earphone generated in a process of plugging or unplugging the earphone, the terminal determines, by detecting a voltage of the first pin, whether the earphone is plugged or unplugged, and the terminal supplies power to the earphone by using the second pin, wherein when an input voltage of the control pin of the switch circuit is lower than a first preset voltage value, the control pin of the switch circuit controls the input terminal of the switch circuit to be connected to the first output terminal of the switch circuit; or when an input voltage of the control pin of the switch circuit is higher than a second preset voltage value, the control pin of the switch circuit controls the input terminal of the switch circuit to be connected to the second output terminal of the switch circuit; wherein the earphone plug comprises conductive sections L, R, G, and M, wherein a line order with the earphone is L, R, G, and M, wherein the length of the section G of the earphone is reduced by X mm compared to the standard earphone plug, and the length of the insulation layer between the section G and the section M is increased by X mm compared to the standard earphone plug; wherein X>0; a value of X is set according to the following conditions: after the earphone is entirely plugged into the earphone socket, a contact of a second pin of the earphone socket comes into reliable contact with a section M of the earphone; and when the earphone is being plugged into the earphone socket, the contact of the second pin of the earphone socket is not in contact with a section G of the earphone at a moment when the first pin of the earphone socket comes into contact with a section L of the earphone. an earphone socket that complies with a standard, said standard also defining a corresponding standard earphone plug, wherein the earphone comprises an earphone plug that does not comply with said standard, wherein the terminal further comprises a switch circuit, an earphone power supply circuit, and a bleeder circuit, wherein the earphone socket comprises a first pin and a second pin, the switch circuit comprises a control pin, an input terminal, a first output terminal, and a second output terminal, the first pin of the earphone socket is connected to the control pin of the switch circuit, the second pin of the earphone socket is connected to the input terminal of the switch circuit, the first output terminal of the switch circuit is connected to the earphone power supply circuit, and the second output terminal of the switch circuit is connected to the bleeder circuit; wherein the bleeder circuit is configured to reduce a difference between voltages passing through an audio-left channel or an audio-right channel of the earphone generated in a process of plugging or unplugging the earphone, the terminal determines, by detecting a voltage of the first pin, whether the earphone is plugged or unplugged, and the terminal supplies power to the earphone by using the second pin, wherein when an input voltage of the control pin of the switch circuit is lower than a first preset voltage value, the control pin of the switch circuit controls the input terminal of the switch circuit to be connected to the first output terminal of the switch circuit; or when an input voltage of the control pin of the switch circuit is higher than a second preset voltage value, the control pin of the switch circuit controls the input terminal of the switch circuit to be connected to the second output terminal of the switch circuit; wherein the earphone plug comprises conductive sections L, R, G, and M, wherein a line order with the earphone is L, R, G, and M, wherein the length of the section G of the earphone is reduced by X mm compared to the standard earphone plug, and the length of the insulation layer between the section G and the section M is increased by X mm compared to the standard earphone plug; wherein X>0; a value of X is set according to the following conditions: after the earphone is entirely plugged into the earphone socket, a contact of a second pin of the earphone socket comes into reliable contact with a section M of the earphone; and when the earphone is being plugged into the earphone socket, the contact of the second pin of the earphone socket is not in contact with a section G of the earphone at a moment when the first pin of the earphone socket comes into contact with a section L of the earphone.