Using The Audio-In (Microphone) Jack - HP Notebook Series Hardware And Software Manual

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Using the Audio-In (Microphone) Jack

The audio-in jack, identified in the following illustration,
connects an optional monaural (single sound channel)
microphone. The audio-in jack is sometimes called a
microphone jack.
It is recommended that you use an electret condenser microphone
with a 3.5-mm plug. If you connect a dynamic microphone, the
recommended sensitivity might not be achieved.
4–4 Hardware and Software Guide