| 摘要 |
<p>PROBLEM TO BE SOLVED: To appropriately suppress echo components or noise components included in a transmission voice even when a vehicle state is rapidly changed.SOLUTION: In a navigation device 1 having a hands-free function, when the change of a vehicle state occurs when a user changes the level of a reception volume or a vehicle speed fluctuates, an ECNR part 9 operates not in accordance with a parameter set before the change of the vehicle state occurs but in accordance with a parameter set (reset) after the change of the vehicle state occurs. Thus, it is possible to avoid such a situation that when the vehicle state rapidly changes, the learning function of the ECNR part 9 does not follow, and to appropriately suppress echo components or noise components included in a transmission voice.</p> |
