RADIO CHARACTERISTIC IMPROVEMENT DEVICE

PROBLEM TO BE SOLVED: To solve the problem that, when audio signal related control such as stereo separation control is exerted by linear control, the result is not always optimum to auditory characteristics of a human being, causing tottering of sound or feeling of noise in auditory sensation to occur.SOLUTION: A control signal detection unit 180 detects control parameters, such as field intensity and multipath component, from a signal derived by converting the received signal of radio broadcasting. A control unit 190 generates, based on the control parameters detected by the control signal detection unit 180, control signals used in audio signal related control, such as a sound volume mute control signal S191, a high frequency component mute control signal S192 and a stereo separation control signal S193, by using an n'th order function curve, and outputs those generated signals.