Earphone status detection method and terminal

A method applied to a terminal to detect an earphone status, wherein the terminal comprises a processor, an earphone connector, and a first detector, the earphone connector comprises a first audio output end, a second audio output end, and a third audio output end, the first audio output end is configured to connect to a first audio input end of an externally connected first earphone, the second audio output end is configured to connect to a second audio input end of an externally connected second earphone, the third audio output end is configured to connect to a second audio input end of the first earphone and a first audio input end of the second earphone, and the method comprises:

• disabling, by the processor, a path for outputting second audio signal to the second earphone;
• after the processor disables the path for outputting the second audio signal to the second earphone, detecting, by the first detector, an electrical signal of the first audio output end and an electrical signal of the third audio output end;
• determining, by the first detector, a first frequency value of a low-frequency resonant point of the first earphone according to the electrical signal of the first audio output end and the electrical signal of the third audio output end;
• and
• determining, by the first detector according to the first frequency value, whether the first earphone is in an in-position state.

A terminal, comprising:

• a processor, an earphone connector, a first detector, a first audio decoder, and a second audio decoder,
• wherein the earphone connector comprises:
• a first audio output end, a second audio output end, and a third audio output end, the first audio output end is configured to connect to a first audio input end of an externally connected first earphone, the second audio output end is configured to connect to a second audio input end of an externally connected second earphone, the third audio output end is configured to connect to a second audio input end of the first earphone and a first audio input end of the second earphone, the first detector is separately connected to the first audio output end and the third audio output end, the first audio decoder outputs first audio signal to the first earphone by using the first audio output end and the second audio output end, the second audio decoder is connected to the second audio output end and the third audio output end to output second audio signal to the second earphone,
• wherein:
• the processor is configured to disable a path for outputting the second audio signal to the second earphone;
• and
• the first detector is configured to detect an electrical signal of the first audio output end and an electrical signal of the third audio output end;
• determine a frequency value of a low-frequency resonant point of the first earphone according to the electrical signal of the first audio output end and the electrical signal of the third audio output end, and determine, according to the frequency value of the low-frequency resonant point, whether the first earphone is in an in-position state.