A global survey has found that city dwellers have better hearing than people who live in quiet villages, and scientists now believe that the ear needs exercise to keep in shape.
A team of scientists at the University of Giessen, Germany, has spent over a decade testing the hearing of more than 10,000 people around the world. As expected, people exposed to extremely loud noises at work, such as construction workers, had poor hearing. But the hearing of those living in quiet, rural areas, such as farmers, was just as bad. Orchestral musicians and airline pilots, by contrast, can usually hear well despite exposure to noise at work. And there is little difference between people who go to noisy concerts and those who do not.
Hearing specialists have long believed that prolonged exposure to excessively loud noise degrades hearing and so industrial standards are based on people’s average exposure to sound energy. However, it is the very strong impulses, such as loud bangs, that do the most damage, whereas exposure to continual noise 'trains' the ear to tolerate it.
A team of scientists at the University of Giessen, Germany, has spent over a decade testing the hearing of more than 10,000 people around the world. As expected, people exposed to extremely loud noises at work, such as construction workers, had poor hearing. But the hearing of those living in quiet, rural areas, such as farmers, was just as bad. Orchestral musicians and airline pilots, by contrast, can usually hear well despite exposure to noise at work. And there is little difference between people who go to noisy concerts and those who do not.
Hearing specialists have long believed that prolonged exposure to excessively loud noise degrades hearing and so industrial standards are based on people’s average exposure to sound energy. However, it is the very strong impulses, such as loud bangs, that do the most damage, whereas exposure to continual noise 'trains' the ear to tolerate it.
Complete the notes, choose NO MORE THAN TWO WORD for each answer.
Các bạn hãy nghe và cố gắng điền từ vào ô trống càng nhiều càng tốt.
Nhấn nút "Check" bên dưới để xem mình nghe đúng bao nhiêu phần trăm. Ô
nào bạn nghe chưa ra được từ thì bạn nhấn vào nút "Hint" để nó gợi ý cho
bạn một ký tự đầu tiên ở ô đó. Luu ý rằng bạn sẽ bị mất điểm mỗi lần
bạn nhấn nút gợi ý. Chúc các bạn nghe tốt!
Bài đăng
Nhận xét này đã bị tác giả xóa.
Trả lờiXóaThank you for sharing. How can I listen to this to answer the questions?
Trả lờiXóa