a radio connection at a form a language study an actual training a device

摘要

PURPOSE: A device for practicing a language study by a wireless connection method is provided to interactively transmit and receive data, and intend cheap maintenance cost and a rapid equipment. CONSTITUTION: An AD conversion interface unit(1A) receives learning contents being spoken from a lecturer or in a language study teaching material or a voice signal being spoken from each trainee, converts the contents or the signal into digital data, and outputs the digital data. A modulation unit(2A) modulates and outputs the digital data into an infrared data association mode for a wireless emission. An infrared LED(4A) converts an inputted signal into an infrared signal and emits the signal by wireless. An LED driving unit(3A) receives the signal being output in the modulation unit(2A), separates the signal into each channel, and drives the infrared LED(4A) for mounting the signal in one frame. A photo diode(4B) receives an infrared signal being emitted in the infrared LED(4A) by wireless, and converts the infrared signal into an electric signal. An amplification unit(3B) amplifies and outputs the electric signal received and converted by the photo diode(4B). A demodulation unit(2B) receives and demodulates the signal amplified in the amplification unit(3B). A DA conversion interface(1B) receives the signal demodulated in the demodulation unit(2B), converts the signal into a sound signal, and transmits the signal to a speaker or a headset.