![]() You then need a 1/4" to 1/8" adapter which can be easily found online or at an electronics store. Typically, a professional microphone will have the jack shown on the right, and the microphone cable will convert from that 3 pin connector to a 1/4" plug. You will need an adapter if your microphone has a 1/4" or a standard professional microphone connector. On a computer this is typically a 1/8" (3.5mm) mono plug. Plug your microphone into the microphone input jack on your computer. Use a laptop for speaker testing if you have one. ![]() If you still want to purchase a calibrated microphone, check out the combined calibrated microphone + software deal from True Audio. So what does this mean? With an uncalibrated microphone you can still design a series or parallel notch filter, but you should not add a contour network based on results from an uncalibrated microphone. It will not help in identifying speakers that gradually increase or decrease in SPL over a wide frequency range since that could be a result of the microphone itself. It will not cause lots of random narrow spikes in your tests, so it can be used to try to find any spikes in a response curve. Most of this error is above 4kHz and is a soft error. Note that your own custom microphone will not be calibrated, so expect a ☓-4dB error vs. If you don't have a microphone for testing, you may want to build your own instead of spending a lot of money for one.Ĭheck out our page on building your own microphone for information on building a quality microphone for under 5 dollars. You will also need software that generates test tones at different frequencies and then reads back those tones using the microphone connected to the computer. You will need a microphone and a computer with a microphone input & headphone/line-out output. ![]() ![]() Now that you have built your speakers, it is time to test them. ![]()
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