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What is the level of noise (in decibels) for a train besides the horn at a distance of 50 feet?

April 26, 2017decibels distance feet Horn level noise train

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What is the level of noise (in decibels) for a train besides the horn at a distance of 50 feet?

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According to the noise level chart in the presentation a DMU at 50 feet emits about 80 dBA, while a diesel locomotive at 50 feet emits a bit less than 90 dBA. To provide a specific noise level, it would be best to know the type of train.