1 Samuel 26:14

14. David cried to the people “The people in these mountainous countries are able, from long practice, so to pitch their voices as to be heard distinctly at distances almost incredible. They talk with persons across enormous wadies, and give the most minute directions, which are perfectly understood. In the stillness of evening, after the people have returned home from their distant fields, the public crier of villages on Lebanon ascends the mountain side, above the place, or to the roof of some prominent house, and gives forth his proclamation with such distinctness that all can hear and understand it.” Thomson.