Apple Macintosh Performa 5400 Series - Manual (Page 39)

Using the built-in microphone
Your Macintosh comes with a built-in microphone for recording live sounds.
The microphone is highly sensitive. Once you’ve turned it on (which you do
with a sound-recording application program), it can pick up sounds within a
range of several feet. For information on recording sound, see the “Sound”
topic of Macintosh Guide, available in the Guide (h) menu.
WARNING Do not stick any small objects into the built-in microphone.
Doing so may damage your equipment.
Built-in microphone
38 Chapter 3