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2014-07-04T20:18:09+08:00

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Negative decibel is sounds that are lower that our hearing 
infrasonic
2  no beacuse there is no more air in most of the trip
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2014-07-04T20:29:27+08:00

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1. yes, negative decibel is decibel sound waves can travel 300 miles through the ocean. or intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale.
2  nope, because there hasn't showck wave during entire trip.

>Hope it helps
don't copy my answer,it is based on my mind !!
From: TaengPark
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