Breaking the Sound Barrier: Teaching Language Leaners How to Listen.To cite use Conti and Smith (2019).This book is for language teachers who want to help their

A virtual sound barrier is an active noise control system that uses arrays of loudspeakers and microphones to create a useful size of quiet zone and can be used

Collection of the author's commentaries from Democracy now!, the daily grassroots global news hour that broadcasts the program via radio, satellite and cable te

Photographs and text chronicle World War II ace Charles "Chuck" Yeager's quest to fly supersonically and profile the people and aircraft that made it possible f