| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio station automatic selection apparatus which can automatically select a radio station whose clarity of reception sound is good even when there is a route passing a fixed radio station. <P>SOLUTION: A radio station automatic selection apparatus 10 comprises: first to third high-pass filters 11<SB POS="POST">1</SB>to 11<SB POS="POST">3</SB>and first to third rectifier circuits 12<SB POS="POST">1</SB>to 12<SB POS="POST">3</SB>functioning as noise level detection means for detecting the levels L<SB POS="POST">1</SB>to L<SB POS="POST">3</SB>of noise components which are frequency components higher than the voice band frequencies of first to third voice signals S<SB POS="POST">1</SB>to S<SB POS="POST">3</SB>; and a noise level comparison circuit 13 and a voice signal selection circuit 14 functioning as voice signal selection means for selecting one voice signal with best clarity from among the first to third voice signals S<SB POS="POST">1</SB>to S<SB POS="POST">3</SB>on the basis of the levels L<SB POS="POST">1</SB>to L<SB POS="POST">3</SB>of noise components of the first to third voice signals S<SB POS="POST">1</SB>to S<SB POS="POST">3</SB>detected by the noise level detection means and outputting the selected one voice signal to a radio control telephone 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
