It was the first natural sound he had heard in days.

In this test subjects are presented a natural sound followed by four pictures.

So he was able to utter quite natural and coherent sounds!

We will start to remember the honest beauty of natural sound.

Then fade out all but the natural sounds of wind and sea.

The film also heavily used natural sounds, such as cattle.

Today the trend is back toward good natural sounds, with less processing.

Twice she stopped to listen, but heard nothing beyond the natural sounds of the night.

It's not the nature in the natural sound that is important, but its predictability.

That is the natural sound of your own life process.