1.   A barely audible whooshing sound was emanating from a far-off ventilation shaft.

2.   Of course, since the audible sounds generated by his device are normal sound waves, the product would simply be ordinary earplugs adorned with his logo.

3.   Once encoded, the data can be reconstructed later into audible sound.

4.   The magic combination is to merge the beamlike nature of ultrasound with the qualities of audible sound.

5.   The most audible sounds were the multiple strains of television noise rising in the muggy night air.

6.   The ultrasound is the lamp, the audible sound is the light.

7.   When the seeds are ripe, the pod bursts open with an audible popping sound, broadcasting the new seeds a good distance from the original flower.