Patent ID: 8913752

Claim:
An audio signal measurement method for a speaker, wherein an electronic apparatus comprises the speaker and a processing circuit, the audio signal measurement method comprising: measuring a voltage value of an audio signal, wherein the speaker sends out sounds based on the voltage value of the audio signal via the processing circuit; measuring a current value of a current feedback from the speaker via the processing circuit; executing a time domain to frequency domain transform according to the voltage value and the current value so as to obtain a frequency response curve via the processing circuit; and determining whether the frequency response curve falls within a predetermined area, and sending out a signal if the frequency response curve falls out of the predetermined area via the processing circuit and wherein the voltage value is represented by the time function v(t), the current value is presented by the time function i(t), and the frequency response curve is obtained by executing the time to frequency domain transform on ( ∫ 0 t ⁢ v ⁡ ( t ) - i ⁡ ( t ) × R dc B ⁢ ⁢ 1 ⁢ ⁢ ⅆ t ) , wherein t represents time, R dc is a resistor value of a driving device of the speaker under a normal room temperature, and B 1 is a constant value of the speaker.