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For centuries, the inhabitants of Aas, in the Pyrénées-Atlantiques region of France, have whistled to communicate from one valley to another. François DUCASSE/Getty Images When you, a human, want to audibly communicate with another person, you generally use your voice. Speech happens when air passes through your larynx, or voice box, and amplifies the noise made there in your throat, nasal passages, sinuses and mouth. This is a great way to communicate, but there are some drawbacks. For instance, if you live on a mountainside and your friend lives one slope over, shouting to each other isn t always that effective. For one thing, shouting creates a lot of echoes among the nooks and crannies of mountain slopes, and the average outdoor range of an intelligible human voice is only about 591 feet (180 meters). Short of walking over to where your friend lives to carry on a conversation at a reasonable speaking distance, or communicating with some sort of visual technique

Julien meyerEsilbo gomeroUniversity of grenobleWorldwide inquiryHuman whistled speechSouthern chinaCanary islandஜூலியன் மேயர்பல்கலைக்கழகம் ஆஃப் க்ரிநோபல்தெற்கு சீனாகேனரி தீவு