Methods for Avoiding Noise and Interference During Acoustic Emission Testing Although noise (including interference) is a problem for acoustic emission, there are many effective methods to prevent it. The following will describe in detail methods for preventing noise (see Section 2.1), using several special methods (see 2.2), selecting the best noise reduction (see Section 3) and the special features of the Vallen AE system that help deal with noise (see Section 4). It can be said that the first contrast between AE signal and noise must be defined. First, the signal is the measurement result of the object of evaluation; compared with the signal, noise is the occlusion or error caused by the signal in any process or phenomenon. In order to increase the signal-to-noise ratio, the following methods will be used: • Signal and AE signal means a signal that is independent of the measurement object • Noise in the signal means any influence that reduces the measurement accuracy of the signal • Artifacts are usually described as discrete data, not related to the measurement
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