The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

These sound waves were then picked up by a receiver as a binary pattern with 1 being reflected sound waves and 0 being unreflected sound waves. This binary signal allows the UBL system to carry ...

Sept. 9 (UPI) --The uniquely shaped wingtips of some silk moths reflect sound waves, helping the insects avoid the jaws of hungry bats. Bats are nocturnal hunters, and though they can see pretty well ...

DURHAM, N.C. -- Researchers at Duke University and Aalto University (Finland) have constructed a "meta-mirror" device capable of perfectly reflecting sound waves in any direction. The ...