| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the dispersion of the volume for every broadcasting station and to listen to them at almost the same volume by automatically adjusting the volume of respective reception signals based on the average value of the maximum values of the reception signal output of the plural broadcasting stations. SOLUTION: For the respective receivable plural radio broadcasting stations, reception is performed for fixed time, the data of the maximum value of sound signals are stored in the data memory part of a digital sound processor DSP: B3 and then, the average value Mm of the maximum values of the respective sound signals is calculated and obtained. When a certain station is selected, the DSP: B3 obtains the ratio Mm/Mx of the maximum value Mx of the reception sound signal output and the Mm, sets the gain of a receiver, sends gain control signals to a μ converter B4 and adjusts the gain of an electronic volume B5. Thus, in the case of successively selecting the plural radio broadcasting stations, they can be automatically listened to at the same volume. Also, the average value Mm is easily updated at all times by a software. |
