A nonwoven acoustic insulating material which also provides repellency to water and low surface tension fluids. The transient recovery circuit operates independently of a regular feedback circuit. In a non-limiting example embodiment, the time position estimator uses an average time position at which other mobile stations previously initiated handover from the source base station to the destination base station as the statistical estimate. The device determines whether an operation state of an internal combustion engine is an impact state, in which the exhaust emission receives a predetermined influence or more from the deviation of the actual injection timing from the target injection timing.