What is impedance?

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I’m currently trying to get the hang of electronics and sound production and I come acrosse “impedance issues” from time to time… For instance, “a preamplifier might load the microphone with low impedance, forcing the microphone to work harder and so change its tone quality” or a contact mike having a low amount of bass because its impedance doesn’t suit the amplifier…

Can anyone help me?

In: Physics

6 Answers

Anonymous 0 Comments

This is an electrical engineering term. Impedance is the amount the circuit will fight the current flow running through it.

There are basically 3 main components we use when designing circuits: resistors, inductors, and capacitors. Any combination of these in a circuit cause a certain total impedance, or amount of “friction” the current flow will see.

In your case the microphone has some small electric current carrying the signal of your voice, so impedance will cause higher “friction” of that voice signal.

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