Comparing Test Microphones for Loudspeaker Distortion Measurement



Published
I evaluate the Shure SM58/57 dynamic microphone for use as a measurement microphone for loudspeaker testing. Why would you want to use this type of a microphone for a speakermeasurement? Well, recently I’ve been suspicious that my current microphone has been limiting my distortion measurements to about -65dB. In other words, I’ve never been able to better this amount regardless of the dozens of drivers I’ve evaluated. It’s too coincidental that I don’t see figures better than this.

Original Blog Post:
https://josephcrowe.com/blogs/news/shure-sm58-dynamic-microphone-for-loudspeaker-measurement

Microphones under test:
Shure SM58
https://www.shure.com/en-US/products/microphones/sm58

Dayton UMM-6
https://www.daytonaudio.com/product/1116/umm-6-usb-measurement-microphone

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Troy Joseph Crowe is a small business located in Canada. He offers custom audio products such as wood horns and speaker cabinet design. He provides services to either individuals, small businesses, or start-ups. All of His designs are available for personal use in the form of 3D CAD files or CNC G-Code. If using for commercial use then licensing may be required for certain technologies. Joseph Crowe has a background in Mechanical Engineering Technology with extensive experience in both the Audio Industry and the Automotive Industry. All design work is done using SolidWorks 3D CAD modeling software. His focus is on audiophile two-channel music systems for the most accurate sound reproduction.
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