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Title
RESEARCH ROUND UP.
Abstract
The article presents research findings relating to noise and vibration. A study on the airflow over the helmet shows that the air noise inside the helmet at speed of 70 miles per hour can cause serious hearing damage. Research on the use of broadband ultrasonic pulses indicates that some properties of leaves can be determined. A study on the use of miniature generators shows its efficiency in producing renewable electrical power from vibrations.