A method for automatically adjusting an environmental frequency response, comprising:
- (a) installing an application software to a communication device;
- (b) displaying an application interface of the application software on a display screen of the communication device, and pressing an Auto EQ start button in the application interface of the application software;
- (c) connecting a Bluetooth/WiFi module of the communication device to a built-in Bluetooth/WiFi module of a stereo via a wireless transmission;
- (d) transmitting a control signal from the Bluetooth/WiFi module of the communication device to a micro-controller of the stereo, and set a whole equalizer integrated circuit of the stereo to a default value of 0 db by the micro-controller, and disabling an adjusting function of the whole equalizer integrated circuit;
- (e) outputting a constant audio frequency of a sine wave audio frequency signal of 1 KHz by the application software through the Bluetooth/WiFi module of the communication device, outputting the sine wave audio frequency signal from a speaker after the Bluetooth/WiFi module of the stereo has received the sine wave audio frequency signal, and then receiving the sine wave audio frequency signal of 1 KHz played by the stereo from a built-in microphone of the communication device, wherein the micro-controller of the stereo adjusts sound volume until a captured audio frequency gain is equal to an appropriate reference gain value;
- (f) outputting the sine wave audio frequency signal of 20 Hz˜20 KHz by the application software after the communication device has obtained the appropriate reference gain value of 1 KHz, transmitting the sine wave audio frequency signal to the Bluetooth/WiFi module of the stereo through the Bluetooth/WiFi module of the communication device, and outputting the constant audio frequency from the stereo;
- (g) receiving the sine wave audio frequency signal played by the stereo from the microphone of the communication device while playing the sine wave audio frequency signal of 20 Hz˜20 KHz, comparing a gain value obtained from a current outputted frequency with the appropriate reference gain value, and further transmitting a control signal to the micro-controller of the stereo to adjust a current audio frequency gain to comply with the appropriate reference gain value;
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- (h) transmitting the control signal to the micro-controller of the stereo to adjust the sound volume to a default value and save current settings of the whole equalizer integrated circuit, to achieve approaching an ideal frequency response curve after the application software has completed making adjustment.