Describir: Human hand transmitted vibration measurements on pedestrian controlle tractor operators by a laser scanning vibrometer

 __   __     ___      _____     _____     _____    __   __  __    __  
 \ \\/ //   / _ \\   |__  //   |  ___||  / ____||  \ \\/ // \ \\ / // 
  \   //   / //\ \\    / //    | ||__   / //---`'   \ ` //   \ \/ //  
  / . \\  |  ___  ||  / //__   | ||__   \ \\___      | ||     \  //   
 /_//\_\\ |_||  |_|| /_____||  |_____||  \_____||    |_||      \//    
 `-`  --` `-`   `-`  `-----`   `-----`    `----`     `-`'       `     
                                                                      
  _____   
 |  ___|| 
 | ||__   
 | ||__   
 |_____|| 
 `-----`