Center for Acoustics and Vibration

About Us

Gary Koopmann, Cliff Lissende, Steve Hambric, and George Lesieutre
From left: Gary Koopman (founder and first director of CAV, 1989-2009), Cliff Lissenden (Current Associate Director), Steve Hambric (Current Director), and George Lesieutre (Director, 2009-2018).


Penn State's Center for Acoustics and Vibration was founded by Dr. Gary H. Koopmann in 1989. After Gary's retirement in 2009, George Lesieutre took over as Director. In 2018, George was promoted to Associate Dean of Engineering, and the CAV is now directed by Steve Hambric, with Cliff Lissenden as Associate Director. The CAV:

  • performs basic and applied research,
  • supports graduate education, and
  • transfers technology to industry.

Dr. Koopmann, with the help of leaders of the CAV's technical groups, brought together Penn State's acoustics and vibrations community - faculty and students alike - to participate in periodic group meetings each semester. Dr. Koopmann and his team also reached out to many corporate sponsors, whose membership fees helped the CAV grow, and allowed us to hold yearly Spring Workshops, along with periodic CAV-sponsored short courses and conferences. Dr. Weicheng Chen was also critical to the success of the CAV, directing several of the CAV labs, and providing technical support, advice, and encouragement for students, faculty, and visiting faculty and scholars.

Through the years, the CAV laboratories have gone through a series of transformations to keep abreast of research trends. CAV labs include a sound transmission loss chamber, an anechoic chamber that accommodates jet noise research complete with a forward flight feature, a well equipped structural vibrations laboratory, and ample room for graduate students in a variety of disciplines.

The CAV also initiated liaisons with international educational institutions, such as ISVR (U.K.), DLR (Germany), and CIRA (Italy). Faculty and students from our international liaisons attend our Spring workshops, and visit the CAV for a semester or two to collaborate with Penn State faculty in their research.

Recent Developments

Following Dr. Koopmann's retirement in 2009, Dr. George Lesieutre assumed direction of the CAV, assisted by Dr. Stephen Hambric. George's promotion to Associate Dean led to Steve assuming the directorship in spring 2018, assisted by Cliff Lissenden as Associate Director. Steve and Cliff continue to lead the CAV forward following the principles established by Gary and George. To learn more about the CAV, please browse this website, or contact Steve at: or Cliff at:

In recent years, the CAV's group of International Liaisons has grown to 8 organizations, and our corporate sponsors have also grown significantly. We have implemented a student thesis database where you can search for and access PDFs of theses in the areas of vibration and acoustics. We are also developing a faculty publications database which will be available soon.