The EDi Comeng is an electric train type long associated with suburban rail services in Australia, and this clip captures its distinctive horn as recorded in 2001. Train sounds like this first circulated among rail enthusiasts who collected and compared different horns, before short clips began appearing in transport videos and soundboards. Unlike a novelty air horn, this recording is valued for its authenticity, giving editors a realistic warning sound rather than a comic effect, which is why it remains useful for train content today.