Lesson 3/Learning Event 1
doublebutton carbon microphones
should be monitored to ensure that it does not exceed the specifications for a
particular microphone; if it does, the carbon granules located in the button will
be fused together and will render the microphone useless.
a. If the double button microphone is being used, the current through each
button should be the same when the diaphragm is at rest.
flowing, unless they are designed for heavy duty use.