Meanings of high whistle in English

Some tens of heartbeats later came a high whistle -one of their 'all-clear 'signals

After Viette left, a high whistle made Bast look down the hill toward the greystone.

Herbert gave a long, high whistle.

The laughter of his sister and his nephews, the high whistle of his father, the song of his grandmother on the wind.

And saying this, this garrulous one walks off with a high whistle on his lips and a grave triumph sitting on his shoulders.

His breath had thinned; Bill remembered that high whistle as Eddie inhaled breath, and knew that he would soon be tooting on the old lung-sucker.

Echoing across the mist-shrouded city came the high whistles of the Quarantine Guard.

Blue-Black responds in high whistles.