A method and device for non-destructive testing of a unit under test, by means of ultrasound, taking into account of the frequency-dependent acoustic attenuation

摘要

The present invention relates to a method for the nondestructive testing of a test specimen 100 by means of ultrasound. In the context of the process, ultrasonic pulses with a specific bandwidth b is produced in the test specimen 100 is coupled in and resulting echo signals received from the test specimen 100. From received echo signals associated with at least two different sound running lengths in the test specimen 100 are correlated, is a frequency-dependent factor f for the sonic attenuation determined in the test specimen 100. Furthermore, the invention relates to a device for carrying out such a method according to is.