Control circuit for small electrodynamic transducers in audio systems depending on the input signal characteristics

The electric device converter (4) of audio signal strength related information frequency response adaptive control circuit, a signal strength information determining device (2 and 6), and audio signals and an signal strength, informationAnd the device (3), a response signal strength information frequency selecting the audio signal, set with an electric converter (4) for converting the audio signal of the audio signal layer high and low distortion audio signal; and a frequency response of the audio signal low level, which is provided with an audio signal high frequency domain gain different the gain audio signal low - frequency range, and mobile low - frequency range and high frequency domain separated frequency, a audio signal lifting layer of high mobile value; and a audio signal first layer of low value mobile. The invention further claims a corresponding design the mobile communication terminal for controlling circuit.