Barriers smaller than this may have a negative effect by elimination of the destructive INTERFERENCE ... a low frequency sound wave around a barrier. Note that the barrier does not create a sound ...

Refraction of sound waves by two layers of air at different temperatures as a result ... For the effect on spectrum, see PHASING. See: CANCELLATION, INTERFERENCE. Ref.: Wiener and Keast, "Experimental ...

an adaptive array antenna was used in the construction of an interference elimination system for a broadcast- wave relay station. Future work will involve the construction of efficient low-cost ...

The idea of controlling wave propagation — directing it to flow ... reflected waves can cause interference, garbling signals or reducing efficiency. Ten years ago, researchers managed to ...

Interference can arise with one source of waves where the waves travel different distances before meeting. The difference in the distance travelled (the path difference) must be a full number of ...