It was The Shadow who heard the faint hissing.

The only other sound was the faint hissing of an open channel from the communicator.

And Roane heard again questioning, though this time in the most subdued whispering, a faint hissing.

The only sound was a faint hissing of the open channel, waiting for the other half of the beacon to be activated.

Dimly, upriver in the distance, there was the echo of a faint hissing.

There was another long silence, broken only by the faint hissing of the open communications channel.

The atmospherics reduced themselves to a faint hissing.

There was only silence after the echo of his voice died away, and the faint hissing of the dying torch.

There was a sound ahead, a faint hissing.

He reined in and watched as the leather-man dove toward them with a faint hissing of wings.