| 摘要 |
The present invention provides the best voice quality to a vehicle driver by adjusting a hands-free system using an equalizer which is optimized for the frequency attributes of a mobile terminal device. Also, the voice quality does not result in degradation even when a mobile terminal device, which has frequency attributes different from the frequency attributes of a previously connected mobile terminal device, is connected for the first time since the hands-free system can be adjusted by the equalizer optimized for the frequency attributes of the mobile terminal device connected afterwards. |
