Casio C721 Manual De Usuario

Safety

sound and distorted hearing. Individual susceptibility to noise-

induced hearing loss and other potential hearing problems varies.

The amount of sound produced by a portable audio device varies 

depending on the nature of the sound, the device, the device 

settings and the headphones. You should follow some common 

sense recommendations when using any portable audio device:

• Set the volume in a quiet environment and select the lowest 

volume at which you can hear adequately.

• When using headphones, turn the volume down if you cannot 

hear the people speaking near you or if the person sitting next 

to you can hear what you are listening to.

• Do not turn the volume up to block out noisy surroundings. 

If you choose to listen to your portable device in a noisy 

environment, use noise-cancelling headphones to block out 

background environmental noise.

• Limit the amount of time you listen. As the volume increases, 

less time is required before your hearing could be affected.

• Avoid using headphones after exposure to extremely loud 

noises, such as rock concerts, that might cause temporary 

hearing loss. Temporary hearing loss might cause unsafe 

volumes to sound normal.

• Do not listen at any volume that causes you discomfort.If 

you experience ringing in your ears, hear muffled speech or 

experience any temporary hearing difficulty after listening to 

your portable audio device, discontinue use and consult your 

doctor.