Capacitance detection apparatus and earphone

A capacitance detection apparatus applied to an earphone, the earphone comprising a front housing and a rear housing, and the capacitance detection apparatus comprises:

• a circuit board, a sensing electrode and a processing unit which are provided at the front housing of the earphone, wherein the circuit board, the sensing electrode and the processing unit are integrated together;
• wherein the sensing electrode is arranged in a first area of the circuit board, the processing unit is arranged in a second area of the circuit board, and the sensing electrode and the processing unit are electrically connected through a metal wiring layer in the circuit board;
• the sensing electrode is configured to sense a to-be-measured object and form a capacitance detection signal, the capacitance detection signal is transmitted to the processing unit through the metal wiring layer, and the processing unit is configured to process the capacitance detection signal to detect the to-be-measured object;
• wherein the circuit board is a flexible circuit board, and the capacitance detection apparatus further comprises:
• a temperature drift compensator, provided on the flexible circuit board and configured to compensate for a temperature drift of the capacitance detection signal of the sensing electrode on the flexible circuit board.