Phát âm chuẩn cùng VOA – Anh ngữ đặc biệt: Fly Sensor (VOA)

Học tiếng Anh hiệu quả, nhanh chóng:, Nếu không vào được VOA, xin hãy vào để vượt tường lửa. Các chương trình học tiếng Anh miễn phí của VOA (VOA Learning English for Vietnamese) có thể giúp bạn cải tiến kỹ năng nghe và phát âm, hiểu rõ cấu trúc ngữ pháp, và sử dụng Anh ngữ một cách chính xác. Xem thêm:

Luyện nghe nói và học từ vựng tiếng Anh qua video. Xem các bài học kế tiếp:

An insect with an extremely unusual ability to hear is the model for what may be the future of hearing aids. The insect, a fly, behaves like a parasite, an organism that lives on or in another organism called a host. This exceptional fly places larva, a young fly, onto a cricket host. The larva digs into the cricket and eats the insect from the inside out. The yellow fly is native to Central America and the southern United States. It finds its larva host by listening for the cricket’s sound. The fly’s strong sense of hearing can direct it to a cricket even 100 meters away. But the insect’s ears are just two millimeters apart. That is so close that sound should reach each ear at almost the same moment. This would make it difficult to find where a sound came from. But, the fly also has a tiny structure between its ears that creates pressure to slow down the sound waves. This permits the fly to identify where the sound came from. Neal Hall is a sound engineer at the University of Texas. He and his team of researchers created an electronic hearing device. The team made a silicon copy of the fly’s ear structures. They used materials that can turn mechanical pressure into electricity. The device requires little power as a result. This means it would be less costly to use. Mr. Hall says the device could improve hearing aids in the future. He says it also could have military and defense uses. But he says more research and development work is required. In July, the journal Applied Physics Letters published a report about the University of Texas research.

Enjoyed this video?
"No Thanks. Please Close This Box!"