Toshiba Portege 3500, User Manual

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Operating Basics
4-20 Portégé 3500
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Your computer has a built-in microphone that can be used to record
monaural sounds into your applications. It can also be used to issue voice
commands to applications that support such functions.
Since your computer has a built-in microphone and speaker, "howling"
may be heard under certain conditions. Howling occurs when sound from
the speaker is picked up in the microphone and amplified back to the
speaker, which amplifies it again to the microphone.
This howling occurs repeatedly and causes a very loud, high-pitched
noise. It is a common phenomenon that occurs in any sound system
when the microphone input is output to the speaker (throughput) and the
speaker volume is too loud or too close to the microphone. You can
control throughput by adjusting the volume of your speaker or through the
Mute function.
To adjust the volume or activate Mute, click
start
, point to
All Programs
,
point to
Accessories
, point to
Entertainment
and click
Volume Control
.
In the
Master Volume
panel, you can use the slide bars to adjust the
volume level or click
Mute
at the bottom of the panel.