Outlook

• Air coupled ultrasound with lower and higher frequencies
• Broader Bandwidth
• Combination with Laser
• The UT equipments high power capability gains advantages
  when used with water squirter technique.
  It allows test of highly attenuating materials, cork, foam,wood, rubber etc..

One of the most visible - and at times most disturbing - features in ultrasonic testing is the use of a couplant medium.

Recent developments in composite materials and their applications have increased the demands for non-contact ultrasonic inspections, i.e. for inspections without the use of the common couplant media [ref.1]. Non-contact and nonimmersion ultrasonic techniques further allow the use of guided waves for rapid and efficient inspection of large parts.

The presented air coupled ultrasonic technique is a non-contact inspection method and an economic alternative to laser based ultrasound.

Hanspeter Loertscher presented the results
Transducer configurations