DYNAMIC FREQUENCY FILTERING SYSTEM AND METHOD OF MICRO SPEAKER UNIT FOR MOBILE TERMINAL DEVICE

An operation frequency filtering system of a micro speaker unit for a mobile terminal and a method are provided to transmit an optimized voice signal for cutting off a frequency band unreproducible in a micro speaker, thereby preventing network transmission traffic caused by unnecessary data transmission as minimizing power consumption of the terminal. A mobile terminal comprises as follows. An impedance measurer(74) measures impedance of a micro speaker(72). A controller(78) detects a resonance frequency of the speaker(72) by referring to the measured impedance, and operates an operation frequency including frequency band information reproducible in the speaker(72) based on the detected resonance frequency. A wireless transmitter(80) transmits the operated operation frequency information to a server(50). The server comprises as follows. A transceiving module(52) transmits a wireless voice signal to the terminal, and receives operation frequency information from the terminal. An adaptation module(54) previously cuts off frequency bands except an operation frequency unreproducible in the speaker(72) among voice signals to be transmitted to the terminal, by referring to the received operation frequency information.