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MICROPHONE COMPARISON
Tests

 

MICROPHONE COMPARISON


A comparison test between different class microphones has been performed.

 

The tested microphones are:

- BRUEL & KJAER 4190 (very expensive)

- Sennheiser electret capsule KE-4 (around 50$, discontinued)

- Panasonic electret capsule WM-61B (around 2$ or less)

 

An open loudspeaker box with a fixed stand for the microphones was used for the test:

 

The B&K 4190 needs a power supply, provided by the manufacturer. The Panasonic WM-61B capsule and the Sennheiser KE-4 capsule require a phantom voltage of 2-10 V. The phantom power of 3.6 V supplied by our X4 was used.

 

The Panasonic WM-61B capsule was tested in 2 different configurations:

and:

 

 

Here are the Panasonic WM-61B specifications and frequency response, provided by the manufacturer:

 

 

They can be easily ordered at DigiKey, part number P11974-ND or P9925-ND.

 

And here are the results of the comparison!

 

 

The frequency responses of the different microphones are quite similar! Probably the B&K mic has better S/N ratio and better specifications, but this test proves that the inexpensive Panasonic WM-61B capsule is quite usable for acoustics measurements.

 

Here follow 2 zoom images of the above plot:

 

 

The measurements have been performed using a MOTU 896HD firewire soundcard at 96 kHz sampling frequency.

 

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