# Intelligent location of simultaneously active acoustic emission sources: Part II

## TL;DR

This paper demonstrates the use of independent component analysis to locate two simultaneous acoustic emission sources in materials, advancing non-destructive testing techniques for aircraft structures.

## Contribution

It applies blind source separation via ICA to accurately locate multiple active AE sources, addressing a key challenge in AE analysis.

## Key findings

- ICA successfully separates and locates two AE sources
- Method shows promise for non-destructive testing of aircraft structures
- Improves accuracy of AE source localization in complex signals

## Abstract

Part I describes an intelligent acoustic emission locator, while Part II discusses blind source separation, time delay estimation and location of two continuous acoustic emission sources. Acoustic emission (AE) analysis is used for characterization and location of developing defects in materials. AE sources often generate a mixture of various statistically independent signals. A difficult problem of AE analysis is separation and characterization of signal components when the signals from various sources and the mode of mixing are unknown. Recently, blind source separation (BSS) by independent component analysis (ICA) has been used to solve these problems. The purpose of this paper is to demonstrate the applicability of ICA to locate two independent simultaneously active acoustic emission sources on an aluminum band specimen. The method is promising for non-destructive testing of aircraft frame structures by acoustic emission analysis.