Abstract: An electronic device is provided. The electronic device includes a reception unit configured to receive an audio signal, a bandwidth change unit configured to gradually change a bandwidth of the received audio signal from a first bandwidth to a second bandwidth during a preset time, when the received audio signal is changed, and an audio output unit configured to output the received audio signal.

Abstract: An electronic device is provided. The electronic device includes a reception unit configured to receive an audio signal, a bandwidth change unit configured to gradually change a bandwidth of the received audio signal from a first bandwidth to a second bandwidth during a preset time, when the received audio signal is changed, and an audio output unit configured to output the received audio signal.

Abstract: A Bluetooth connection establishment method and system is provided for facilitating establishment of a communication channel between a master device and a target slave device. The method has the steps of broadcasting an inquiry signal for discovering a slave device and transmitting an inquiry response signal. The inquiry response signal is communicated from the slave device to a master device and the inquiry response signal indicates that the inquiry signal has been received by the slave device. The method requests at the master device that the at least one slave device transmits identification information. A slave device list is displayed. An alarm is transmitted by the at least one slave device that received the inquiry signal and a second alarm is transmitted by a target slave device selected from the slave device list in response to an alarm trigger signal transmitted by the master device.

Abstract: A method of and an apparatus for controlling power of a headset operating via a protocol such as Bluetooth headset reduces power consumption. The Bluetooth headset has a power-off mode, a power-on mode, and a sensor mode. When the Bluetooth headset is set to the sensor mode, at least one sensor senses status information of the Bluetooth headset (whether the Bluetooth headset is being worn) and the Bluetooth headset may be turned on/off according to the sensed result.

Abstract: A Bluetooth connection establishment method and system is provided for facilitating establishment of a communication channel between a master device and a target slave device. The method has the steps of broadcasting an inquiry signal for discovering a slave device and transmitting an inquiry response signal. The inquiry response signal is communicated from the slave device to a master device and the inquiry response signal indicates that the inquiry signal has been received by the slave device. The method requests at the master device that the at least one slave device transmits identification information. A slave device list is displayed. An alarm is transmitted by the at least one slave device that received the inquiry signal and a second alarm is transmitted by a target slave device selected from the slave device list in response to an alarm trigger signal transmitted by the master device.