Duration

Definition

Duration is the time interval between the first and last threshold crossing of an AE signal.

Explanation

It describes how long the signal remains above the detection threshold and is commonly used in signal characterization.

Key Notes

• Measured in microseconds
• Related to signal complexity
• Influenced by threshold settings
• Often correlated with energy

Applications

• Crack monitoring
• Corrosion monitoring
• Signal classification
• Noise discrimination

FAQ

Q: Does longer duration mean more severe damage?

Not always. Duration depends on both source behavior and wave propagation effects.

Q: How does threshold affect duration?

Higher thresholds may shorten the measured duration by ignoring weaker portions of the waveform.

Related Terms

Counts, Rise Time, AE Hit, Threshold