Understanding Acoustic Emission Testing- Reading 1 Part B-A

3. Passband filters: are used to suppress the acoustic emission signals that
lie outside of the frequency range of interest.
(high pass, low pass, selective pass)
4. The main amplifier: further amplifies the signals, typically with a gain of
an additional 20 to 60 dB.
5. The threshold discriminator: is used to set the threshold voltage above
which signals are counted (or analyze) .
The remainder of the electronic equipment depends upon the way in which
the acoustic emission data are to be recorded, analyzed, and displayed.
Acoustic emission testing may be carried out in the laboratory or in the field.
Basically, one or more acoustic emission transducers are attached to the
specimen. The specimen is then loaded slowly, and the resulting acoustic
emissions are recorded.
Charlie Chong/ Fion Zhang