Toshiba Pro A300D 用户手册

User’s Manual

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Operating Basics

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.

The availability of this feature is depending on the model you purchased.

This section describes how to connect and disconnect the internal modem 

to and from a telephone jack.

Chooses from the : Options tab to change the 

tool position; the Picture tab to select picture 

output options such as size, export file and saving 

location; the Video tab to choose output settings 

such as Frame Rate, Size, Compression and the 

file save path; the Audio Device, 

Compression,Volume and file save path.

Displays the help files for the software.

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