Pressure Fluctuation Contours (2 of 3) (VIDEO) Toyohashi University of Technology (TUT) This video is under embargo. Please login to access this video. Caption This video shows contours of pressure fluctuation in a recorder with opened tone holes and with closed tone holes. Credit COPYRIGHT (C) 2014 TOYOHASHI UNIVERSITY OF TECHNOLOGY. ALL RIGHTS RESERVED. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.