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Simulation and calculation files for the Calibrated Measurement Microphone
A set of files (mainly spreadsheets and LTspice simulations) that can be used to customise the frequency response of a Measurement Microphone or otherwise used to verify the design.
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Calibrated mic capsule set - Panasonic WM61A lot 4A14
A WM61A electric capsule microphone (ECM) as described in the August 2023 article on making a Calibrated Measurement Microphone.
Included with the capsule are the required SMD 100Ω resistor and 6.8nF capacitor to flatten out the frequency response.
Once we've sent the capsule, a download link will appear below this item so you can get the calibration files. The capsule will be numbered so you know which file to use.
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Calibrated mic capsule set - JLI61A lot 3
A JLI61A electric capsule microphone (ECM) as described in the August 2023 article on making a Calibrated Measurement Microphone.
Included with the capsule are the required SMD 220Ω & 2.2kΩ resistors and 12nF & 15nF capacitors to flatten out the frequency response.
The 15nF capacitors are marked with an orange stripe.
Once we've sent the capsule, a download link will appear below this item so you can get the calibration files. The capsule will be numbered so you know which file to use.
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Calibrated mic capsule set - JLI60A V02
A JLI60A electric capsule microphone (ECM) as described in the August 2023 article on making a Calibrated Measurement Microphone.
Included with the capsule are the required SMD 220Ω & 10kΩ resistors and 6.8nF & 12nF capacitors to flatten out the frequency response.
The 12nF capacitors are marked with an orange stripe.
Once we've sent the capsule, a download link will appear below this item so you can get the calibration files. The capsule will be numbered so you know which file to use.
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Calibrated mic capsule set - CMC6027
A CMC6027 electric capsule microphone (ECM) as described in the August 2023 article on making a Calibrated Measurement Microphone.
Included with the capsule are the required SMD 220Ω & 3.9kΩ resistors and 18nF capacitors to flatten out the frequency response.
Once we've sent the capsule, a download link will appear below this item so you can get the calibration files. The capsule will be numbered so you know which file to use.
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Calibrated mic capsule set - CMC2742
A CMC2742 electric capsule microphone (ECM) as described in the August 2023 article on making a Calibrated Measurement Microphone.
Included with the capsule are the required SMD 820Ω & 2.2kΩ resistors and 4.7nF & 8.2nF capacitors to flatten out the frequency response.
The 4.7nF capacitor is in clear tape while the 8.2nF is in paper tape.
Once we've sent the capsule, a download link will appear below this item so you can get the calibration files. The capsule will be numbered so you know which file to use.
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Calibrated Measurement Microphone PCB (SMD version) [01108231]
The SMD version PCB for the Calibrated Microphone.
Double-sided PCB with plated through holes, blue solder mask and silkscreen overlay.
64 x 13mm.
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Calibrated Measurement Microphone PCB (TH version) [01108232]
The through-hole version PCB for the Calibrated Microphone.
Double-sided PCB with plated through holes, blue solder mask and silkscreen overlay.
99 x 13mm.
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Calibrated Measurement Microphone PCB patterns (PDF download) [01108231/2]
A PDF with the PCB patterns for both Calibrated Microphone PCB designs.
They are double-sided designs; both layers of each are on the same page of the PDF.
Note that this would be pretty impractical to etch yourself so it's mainly provided as a reference.
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Short-form kit for the Calibrated Microphone (SMD version)
A kit that includes the PCB and all SMD components to build the main circuit board for the Calibrated Measurement Microphone. Suitable electret microphone capsules (ECMs) are available separately and those sets also include the required compensation components.
All that's left is the XLR socket, wire and housing. There are two options for the housing, as described in the article.
Note: photo shows assembled module. Some components may have a different appearance.
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Short-form kit for the Calibrated Microphone (TH version)
A kit that includes the PCB and all through-hole components to build the main circuit board for the Calibrated Measurement Microphone. Suitable electret microphone capsules (ECMs) are available separately and those sets also include the required compensation components.
All that's left is the XLR socket, wire and housing. There are two options for the housing, as described in the article.
Note: photo shows assembled module. Some components may have a different appearance.
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