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Preamplifier

Preamplifier Definition A preamplifier is a device that amplifies weak AE signals close to the sensor before transmission. Explanation It improves signal quality by increasing amplitude and reducing noise influence. Key Notes Typical gain: 2040 dB Ins

Couplant

Couplant Definition A couplant is a material used to improve the transmission of acoustic waves between the sensor and the test surface. Explanation It eliminates air gaps and ensures efficient transfer of acoustic emission signals. Key Notes Common m

Noise Filtering

Noise Filtering Definition Noise filtering is the process of removing unwanted signals from acoustic emission data. Explanation It helps isolate meaningful AE signals from environmental, mechanical, or electrical noise. Key Notes Essential for accurat

Signal-to-Noise Ratio (SNR)

Signal-to-Noise Ratio (SNR) Definition Signal-to-Noise Ratio (SNR) is the ratio between the useful AE signal and background noise. Explanation A higher SNR indicates better signal quality and more reliable detection of acoustic emission events. Key No

AE Monitoring

AE Monitoring Definition AE monitoring is the continuous observation of acoustic emission activity in a structure over time. Explanation It is widely used in structural health monitoring systems to detect damage progression and assess structural integ

Acoustic Emission Testing (AET)

Acoustic Emission Testing (AET) Definition Acoustic Emission Testing (AET) is a non-destructive testing method that detects elastic waves generated by active damage processes in materials. Explanation AET monitors structures in real time by capturing

All Terms

A. 基础概念（Fundamentals） 1．Acoustic Emission (AE) 2．AE Source 3．Elastic Wave 4．Transient Signal 5．Stress Wave 6．Passive Monitoring 7．Active Source 8．Structural Health Monitoring (SHM) 9．Damage Mechanism 10．Energy

Acoustic Emission (AE)

1、 Acoustic Emission (AE) Definition Acoustic Emission (AE) is the phenomenon of transient elastic waves generated by the rapid release of energy from localized sources within a material. Explanation In acoustic emission testing, these waves are det

AE Sensor

2、 AE Sensor Definition An AE sensor is a transducer that converts acoustic emission waves into electrical signals for analysis. Explanation Typically based on piezoelectric materials, AE sensors detect high-frequency stress waves generated by damag

AE Event

3、 AE Event Definition An AE event is a physical occurrence within a material that generates acoustic emission waves. Explanation It represents a real damage mechanism such as crack initiation, crack growth, or fiber breakage, which may produce mult