noun
sound of a moving vehicle; running sound
Refers to the noise produced by a vehicle in motion, such as a train, car, or bus. Often used in contexts like noise complaints, vehicle testing, or describing ambient sounds.
夜になると、線路から走行音が聞こえてくる。
At night, you can hear the sound of trains running from the tracks.
このタイヤは走行音が静
These tires are quiet and comfortable in terms of running noise.