Your analog headset is only as good as the sound card you plug it
into. Sound cards reside in a PC close to noisy components and devices
like CDs, high frequency CPUs, graphic cards, memory chips and hard
drives. Sound cards therefore live in a high electromagnetic interference
noise environment.
The problem is even more pronounced in small form-factor machines,
like portables, where electronic components are even closer together.
In these cases, bypassing the traditional analog sound card inputs
becomes even more important.
That's where USB comes in. USB, or Universal Serial Bus, is a high-speed
digital connection directly into your PC. The USB connector is now
ubiquitous, as it has been included on virtually every PC sold over
the past several years. Connecting a headset via a PC's USB port
allows you to bypass the sound card entirely, resulting in a cleaner
and stronger signal. Plantronics' new digital/USB interface provides
optimal audio fidelity for the headset.
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