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Modern over-the-ear headphones offer incredible sound and impressive noise-cancelling, often for a surprisingly low price. (Photos: 1More, Soundcore, Sony)
Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.
The iPhone Stereo Headset was introduced in 2007 and was bundled with the original iPhone and iPhone 3G, and featured a control capsule in-line with the left earbud's wire with a microphone and a single button, actuated by squeezing the unit, which can be programmed to control calls, presentations, music and video playback, launch Siri, or take pictures with the Camera application.
The wireless headset communicates with the base-station via 2.4 GHz RF, and the voice signals are sent or received via the base unit to the telephone unit. Some products will also offer an automatic handset lifter , so the user can wirelessly lift the handset off the telephone by pressing the button on the wireless headset.
Plus, more than 4,000 shoppers have given them five stars.
Battery life: 3500mAh, 6 hours talk time | Camera: 5 MP front camera and two rear cameras: 13 MP with auto focus, and 5 MP with a flash | Extra features: Voice typing, video chat | Storage: 32 GB ...
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