sonic barrier

Despite travelling faster than the speed of sound the plane would not have broken the sonic barrier as it was helped along by fast-moving air.

Sound was initially dismissed as a possible deterrent when research revealed fishes become acclimated to constant tones and would eventually move through a sonic barrier.

Boom isn’t the only player in the race to bring air passengers pass the sonic barrier once more.

But if the Liberal wins, it's going to break the psychological sonic barrier in Calgary.

An accelerating, effortless flight, a faint tremor as they passed the sonic barrier, then no sensory impressions at all.