Sony VAIO PCG41313L, Руководство пользователя

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Using Peripheral Devices >
Using the Noise Canceling Headphones
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External speakers
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Headphones without the noise canceling function
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Sound output devices connected to your computer via a BLUETOOTH connection
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The noise canceling function cannot be fully in effect unless you properly wear the headphones. Be sure to fit earpieces
of the headphones tightly into your ears.
If you feel that the noise canceling function has little effect, adjust the earbud position in the earpieces of the noise
canceling headphones or replace the earbuds with a pair in another size. A pair of medium-size earbuds is attached to
the earpieces by default and there should be an extra pair in each small and large sizes supplied with the headphones.
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The noise canceling function is to reduce low-frequency noise in the ambient environment but not high-frequency noise.
Nor is it to implement a 100% noise-free audio environment.
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When the noise canceling function does not seem to be working, unplug the supplied noise canceling headphones
completely and then plug them back again.
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Keep the built-in microphone (1) of the noise canceling headphones unblocked to ensure that the noise canceling function
can be fully in effect.