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Sound system, Sound system -11, Using the microphone – Toshiba Portege R200 (PPR21) User Manual

Page 69

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User’s Manual

4-11

Operating Basics

3. Always handle floppy disks with care, to prevent the loss of stored data.

Always apply the floppy disk label in the correct location. Never apply a

new label on top of an existing one. The label could come loose and

damage the floppy drive.

4. Never use a pencil for writing on a floppy disk label. Pencil lead dust

could cause a system malfunction. Always use a felt-tipped pen. When

writing a title on a label, first write on the label, then apply the label to

the floppy disk.

5. Never put a floppy disk in a location where water or other liquid may

contact it or where it is excessively damp. It could cause data loss.

Never use a wet or damp floppy disk. It could damage the floppy disk

drive or other devices.

6. Data may be lost if the floppy disk is twisted; bent; or exposed to direct

sunlight, extreme heat or cold.

7. Do not place heavy objects on your floppy disks.
8. Do not eat, smoke, or use erasers near your floppy disks. Foreign

particles inside the floppy disk’s jacket can damage the magnetic

surface.

9. Magnetic energy can destroy the data on your floppy disks. Keep your

floppy disks away from speakers, radios, television sets and other

sources of magnetic fields.

Sound System

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.
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

Volume Control

panel, you can use the slide bars to adjust the

volume level or click Mute at the bottom of the panel.