| 摘要 |
PROBLEM TO BE SOLVED: To provide an adapter for a freehands talk for portable telephone which enable a speech without holding the portable telephone, i.e., in a handsfree state and output a voice of high quality which is free from noise and howling. SOLUTION: This adapter comprises a main body equipped with a microphone which converts a voice into a voice signal and supplies it to the portable telephone and a light emission part which converts the voice signal supplied from the portable telephone into infrared light and transmits it, and an earphone part equipped with a light reception part which receives and converts the infrared light transmitted from the main body part into a voice signal and an earphone which is supplied with the voice signal from the light reception part to generate a voice, so the user can talk in the handsfree state with the earphone part applied to the ear, howling can be prevented, and a noise-free voice of high quality can be outputted. |
