Apple iMac G5 (iSight) User Manual download pdf (Page 63)

Appendix B Safety, Use, and Care Information 63

Avoid Hearing Damage

Ergonomics

Chair

An adjustable chair that provides firm, comfortable support is best. Adjust the height of

the chair so that your thighs are horizontal and your feet flat on the floor. The back of

the chair should support your lower back (lumbar region). Follow the manufacturer’s

instructions for adjusting the backrest to fit your body properly.

Warning: Permanent hearing loss may occur if earbuds or headphones are used at

high volume. You can adapt over time to a higher volume of sound that may sound

normal but can be damaging to your hearing. If you experience ringing in your ears

or muffled speech, then stop listening and have your hearing checked. The louder the

volume, the less time required before your hearing can be affected. Hearing experts

suggest that to protect your hearing:

Â Limit the amount of time you use earbuds or headphones at high volume

Â Avoid turning up the volume to block out noisy surroundings

Â Turn the volume down if you can’t hear people speaking to you

Thighs tilted slightly

Shoulders relaxed

Screen positioned to avoid

reflected glare

Forearms and hands

in a straight line

Forearms level

or tilted slightly

Lower back supported

Feet flat on the floor

or on a footrest

Top of the screen at or slightly below

eye level (You may need to adjust the

height of your display by raising or

lowering your work surface.)

Clearance under work surface

45–70 cm (18–28 in.)

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 95 96

No comments

Apple iMac G5 (iSight) User Manual Page 63