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Horns in the distance
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I don't think people measured distance very accuratly, since I did extensive measurment about distance and train horn. As where I live, Scarborough , Canada, the CP rail running across markham road will horn it's 5 flute horn regularly, thus I did a measure, and came to a conclusion: <br />withink distance 2.7km, the train horn is very clear but not that loud, and at distance 4.2km, the horn is so faint, that one can't hear it unless it's super quiet( which I spent a night to listen at and only caught a very faint horn, almost inhearable), thus I doubt that people here claim that they can hear horn within 5 miles(which is 8km) will be accurate. <br /> <br />actually those of you who claimed about distance is very inaccurate, since I've asked my friends to look at my map or just estimate the distance from their home to some shop, all of them did an inaccurate measurment, mostly likely claiming 3km only for a 1km long distance, one person even claim the rail is about 3km away, but actually it turns out that it's indeed only 900m. oops... <br /> <br />so people, I think you 'd better look at maps.google.com, take a scaler and measure it according to the map scalar where clearly stated the distance. Since I am very curious about how far you can hear the horns tooo.. but my experiment shows that even during a quiet night, you can only be able to detect at 4.2km distance. <br /> <br />another experiment I did is about to measure a direct in-sight sound source, besides the ontario lake, the toronto island airport once has a f-15 fighter taking off in sight, the typical fighter jet taking off is about 110db (much higher than any train horns), but within sight(yes, I can clearly watch it taking off, since it's all lake, and nothing else, sound could've gone thru very well ,without obstacles), I can't ,can't hear any thing about it,... then back home, drag out my map, I measured the distance which is only 6km,(around 3.75miles). <br /> <br />so measure it with maps, like maps.google.com, and tell me the real results, I am very curious about the distance of horns too. <br /> <br />cheers!
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