I'm used to have ready-made microphones with XLR plugs which are easily connected to the input of my audio interface. Now, I'd like to buy a vibrometer (Knowles BU-21771-000) which is sold as an electronic component. I'm not so strong in electronics and I don't find a proper associated documentation to design the whole electronic circuit. What should I do to connect it to my audio interface (XLR or jack input)?
On the datasheet, it is said that it was tested as follows:
Does it mean that I should buy a 5.6 kOhm resistor, a 1.5V power supply, and solder the outputs to the + and - of an XLR cable which will be connected to the sound interface?
Should I add a connection between the vibrometer 0 (ground?) to the XLR cable ground? If yes, why don't they put one on the "test diagram"? If not, what is this connection for?
How do you deal with impedance mismatch?