| 摘要 |
PROBLEM TO BE SOLVED: To provide an output controller for an acoustic information reproduction means that can surely prevent malfunction and deficient sensitivity without the need for frequent change of the sensitivity. SOLUTION: In the case that a sensitivity registration key of a key entry device 8 is depressed, entry of a sensitivity setting key is awaited. When the sensitivity setting key is depressed, the position of a mobile body is read from a GPS receiver 5 and a prescribed range from the position is stored in a memory as a sensitivity switching area. Furthermore, the sensitivity set by the sensitivity setting key is also stored in the memory in cross-reference with the sensitivity switching area. After the 2nd and succeeding entries of the mobile body, when the mobile body detects that it enters this registered sensitivity switching area, the mobile body allows a detection circuit 2 to select the registered sensitivity.
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