| 摘要 |
In a sound information output system installed in a vehicle, a first determining unit is communicable with a handsfree cellular phone unit. The handsfree cellular phone unit allows handsfree conversation. The first determining unit is configured to determine whether the handsfree cellular phone unit is in off-hook state or in on-hook state. A holding unit is configured to hold output of the first sound information when it is determined that the handsfree cellular phone unit is in off-hook state.
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