A 50 percent decrease in echo amplitude is equal to a loss of how many decibels?

Related MCQs

• An increase in gain of how many decibels corresponds to a 5:1 increase in flaw echo amplitude?
• How many decibels of attenuation correspond to an ultrasonic signal loss of from 100% to 25% on full screen height?
• When testing a test piece with parallel front and back surfaces, no back wall echo can be obtained. Which of the following actions might enable you to obtain a back wall echo?
• Compared to the echo returned from a smooth reflector, the echo returned from a natural flaw of the same area and orientation is:
• Echo amplitude losses may be caused by:
• An ultrasonic display which shows echo locations and amplitude is called:
• Loss of the test piece back wall echo during scanning may be caused by:
• The echo on the cathode ray tube (CRT) which represents the far boundary of the material being tested is called:
• AA display which shows the initial pulse and the front surface echo superimposed would be considered:
• AA display which shows the initial pulse and the front surface echo with a fairly wide space between the two would be considered: