Headphone and headphone status detection method

A headphone, comprising:

• a signal processor, configured to sequentially transmit a plurality of code messages with different frequencies in a period, wherein, in the period, any two code messages that are successively transmitted among the plurality of code messages correspond to different frequencies;
• a first audio playback unit, receiving the plurality of code messages and playing a plurality of first audio signals whose frequencies corresponding to the plurality of code messages according to a playback sequence;
• and
• a first audio receiving unit, wherein
• the signal processor obtains a plurality of first time points at which the first audio receiving unit receives the plurality of first audio signals that are reflected for the first time;
• and the signal processor determines a wear status of the headphone according to the plurality of first time points.