Sony VAIO VPCZ12 SERIES - Manual (Page 93)

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Using Peripheral Devices >
Using the Noise Canceling Headphones
Using the Noise Canceling Headphones
A pair of noise canceling headphones may be supplied with your computer.
Some features and options in this section may not be available on your computer.
See the specifications to find out about the configuration of your computer.
The noise canceling headphones are equipped with a built-in microphone that picks up ambient noises and outputs an
antiphase sound to reduce the noises.