Using The Microphone; Wireless Communications - Toshiba NB250 series User Manual

Using the microphone

You can use the built-in or an external microphone that connects to the
microphone jack 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 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.

Wireless communications

The computer's wireless communication function supports Wireless LAN
devices.
Wireless LAN
The Wireless LAN is compatible with other LAN systems based on Direct
Sequence Spread Spectrum/Orthogonal Frequency Division Multiplexing
radio technology that complies with the IEEE802.11 Wireless LAN
standard.
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Frequency Channel Selection of 2.4GHz for 802.11bg or n 2.0
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Roaming over multiple channels
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Card power management
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Wired Equivalent Privacy (WEP) data encryption based on an 128-bit
encryption algorithm
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Wi-Fi Protected Access™ (WPA™) support
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Advanced Encryption Standard (AES) data encryption
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The transmission speed over the wireless LAN, and the distance over
which the wireless LAN can reach, may vary depending on surrounding
electromagnetic environment, obstacles, access point design and
configuration, client design and software/hardware configurations. The
transmission rate described is the theoretical maximum speed as
specified under the appropriate standard - the actual transmission
speed will be lower than the theoretical maximum speed.
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To enable or disable wireless communication, use the Hot Key FN+F8.
For more information see the
User's Manual
Hot keys section in Chapter 5.
Operating Basics
4-6