Only Hearing Trains at Night? No, You’re not Crazy

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Believe it or not, it is common for people who live far from railroad tracks to hear trains at night and only at night. While this may be due to trains only running in the evening or due to lower overall sound levels in the nighttime, there is a surprising physical explanation why a person might hear a train in the nighttime and not in the day.

Sound waves, like other types of waves, experience bending or refraction when ...

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