Toshiba SATELLITE U500 - Manual (Page 78)

4-14 User’s Manual
Satellite U500/U500D, Satellite Pro U500/U500D
Using the microphone
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.(Built-in microphone
is provided with some models)
Since your computer has a built-in microphone and speaker, “feedback”
may be heard under certain conditions. Feedback 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 feedback 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 in the Master Volume panel. Refer to your Windows documentation
for details on using the Master Volume panel.
Using the Face Recognition
Face Recognition uses a face verification library to verify the face data of
users when they log in to Windows. The user can thus avoid having to
enter a password or the like, which makes the login process easier. This
software is pre-installed with some models.
Note on Use
■ Face Recognition does not guarantee the correct identification of a
user. Changes to the likeness of a registrant, such as hair style
changes, wearing a cap, or wearing glasses may affect the recognition
rates when such changes occur after the registrant had registered.
■ Face Recognition may incorrectly recognize faces that are similar to a
registrant.
■ For high security purposes, Face Recognition is not a suitable
substitute for Windows passwords. When security is a high priority,
use your established Windows passwords to log in.
■ Bright background light and/or shadows may prevent a registrant from
being recognized correctly. In that case, log in using your Windows
password. If recognition of a registrant fails repeatedly, refer to your
computer documentation to learn ways to improve recognition
performance.