Simplified Three-Microphone Acoustic Test Method

Accepted acoustic testing standards are available; however, they require specialized hardware and software that are typically out of reach economically to the occasional practitioner. What is needed is a simple and inexpensive screening method that can provide a quick comparison for rapid identifica...

Full description

Saved in:
Bibliographic Details
Published in:Instruments (Basel) 2017-12, Vol.1 (1), p.4
Main Authors: Pelletier, Mathew, Holt, Greg, Wanjura, John
Format: Article
Language:English
Subjects:
Accuracy
Acoustic measurement
acoustic testing
Acoustic tests
Acoustics
ASTM E1050
ASTM E2611
Correlation analysis
International organizations
ISO 10534
Microphones
Signal processing
Test methods
three-microphone method
two-microphone method
Ultrasonic imaging
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Accepted acoustic testing standards are available; however, they require specialized hardware and software that are typically out of reach economically to the occasional practitioner. What is needed is a simple and inexpensive screening method that can provide a quick comparison for rapid identification of the top candidates. This research reports on the development of an acoustical rapid-test method that achieves these objectives. The method is based upon a reformulation of the well-regarded three-microphone method. The new formulation reduces the number of required microphones to a single microphone and removes the need for simultaneous capture and extensive signal-processing analysis. The study compares the proposed simplified method to two standard methods and the three-microphone method. The results of the correlation analysis between the new method versus the original method produced a coefficient of determination of r2 = 0.994. A simulation study highlighted several unique accuracy advantages of this new proposed method in comparison to the existing standard methods. The proposed new method represents an easy-to-use technique that requires little in the way of equipment and can be set up with minimal training and expense.
ISSN:2410-390X
2410-390X
DOI:10.3390/instruments1010004