The present invention provides a device and method to efficiently turn light from an optical fiber around a corner while avoiding the frustrated-TIR loss that would occur if the fiber were bent. The system plays audible speech samples, stored in sound files, so that the file that most resembles the user’s speech may be selected. The invention also concerns a device for implementing said method. According to the above configuration, a head positioning device employing a two-stage actuator is able to perform positioning control with stable operation even when it receives external disturbances such as vibrations and impacts.