Type of microphone for capturing acoustic emissions

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SUMMARY

The discussion focuses on selecting the appropriate microphone for capturing acoustic emissions related to tool wear in milling processes. The user seeks recommendations for high-frequency microphones, specifically considering piezoelectric sensors, intensity acoustic sensors, and ultrasonic microphones. Previous experiments with standard microphones have proven inadequate, prompting the need for specialized equipment capable of capturing high-frequency acoustic signals. The conversation highlights the importance of frequency response in selecting the right microphone for effective data collection.

PREREQUISITES
  • Understanding of acoustic emission principles
  • Familiarity with piezoelectric and ultrasonic sensor technologies
  • Knowledge of Fast Fourier Transform (FFT) data analysis
  • Basic concepts of tool wear detection in manufacturing processes
NEXT STEPS
  • Research high-frequency piezoelectric microphones for acoustic emission applications
  • Explore ultrasonic sensor options for industrial monitoring
  • Study the implementation of FFT in analyzing acoustic signals
  • Investigate case studies on tool wear detection using acoustic data
USEFUL FOR

Researchers in manufacturing processes, acoustic engineers, and professionals focused on tool wear monitoring and analysis will benefit from this discussion.

engineer23
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I am currently trying to incorporate the sensing of tool wear as part of my research, which is an investigation into an experimental manufacturing process that is probably most similar to milling. I have already been making use of force data, but would like to utilize acoustic data as well (there are a number of papers on detecting tool wear in milling which record the acoustic signals and then transform the data using FFTs). I would like to do something similar to this, but am unsure of what is the best type of microphone to purchase.

Based on previous experiments with a very crude standard-issue microphone, I think I need something that is capable of capturing high frequencies. Does anyone have any recommendations with regard to products or vendors? I have been looking at piezoelectrics, intensity acoustic sensors, and ultrasonics. My knowledge of acoustic sensing is very limited, so any help you could offer is much appreciated!
 
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How can we answer that if you don't tell us how high is high?

A simple search for high frequency microphones finds many hits. Do none of those meet your requirements?
 

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