sonic barrier
sound barrier

Next time it was up to thirteen hundred, and he realized they had passed through the sonic barrier without even a shudder.

That was surprising, since the wands for a sonic barrier should be about the thickness and length of a little finger.

Instantly a pair of Masters restored the sonic barrier, but the procession did not move on.

Evidently the ice enclosure was a perfect sonic barrier.

The Zero slid through the sonic barrier without a buffet or bump.

The fighter sliced through the sonic barrier with only the barest jolt.

The descending machine must have been close to the sonic barrier.

I've also instructed the remaining workers to construct a sonic barrier around the camp.

I, on the other hand, am willing to risk going outside the sonic barrier to get those bioscans.

The sonic barrier that we erected around the camp has failed.