Last couple of weeks I was busy with upgrading my acoustical measurement kit. Lot’s of new and interesting (I hope) content. First, there is a main article “Measurement Microphones & Calibration” were I talk about my particulate tools and how I calibrated them. Then I made a separate tear-down of Dayton EMM-6 measurement mic and reverse engineered it’s schematics. DIY section got updated with useful tools for acoustical measurements. These include microphone holder, calibration chamber and 1kHz calibration. All schematics and 3D design files are included if anyone wishes to reproduce them. Happy reading!