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1st Logitech mouse C7 ... also works as a mouse. Custom Logitech presentation software [73] 3D controllers ... except the new G203 Mouse G533 Wireless Gaming Headset
Fogel is considered to be the inventor of active noise cancellation, and he designed one of the first noise-cancelling headphones systems. Later on, Willard Meeker designed an active noise control model that was applied to circumaural earmuffs for advanced hearing protection. Noise-cancelling aviation headsets are now commonly available. [5] [6]
Most external microphone designs are of either omnidirectional or noise-canceling type. Noise-canceling microphone headsets use a bi-directional microphone as elements. A bi-directional microphone's receptive field has two angles only. Its receptive field is limited to only the front and the direct opposite back of the microphone.
Active noise-cancelling headphones use a microphone, amplifier, and speaker to pick up, amplify, and play ambient noise in phase-reversed form; this to some extent cancels out unwanted noise from the environment without affecting the desired sound source, which is not picked up and reversed by the microphone. They require a power source ...
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[4] [50] [51] In October 2012, Beats unveiled its first two self-developed products, the Beats Executive noise-cancelling headphones (to compete with similar offerings by Bose and Sennheiser) and the Beats Pill portable speaker. [6] [14] In October 2015, Beats launched a new collection of speakers including the upgraded Beats Pill+ Speaker. [52]
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Logitech Unifying receiver (older) Logitech Unifying receiver (newer) Unifying logo The Logitech Unifying Receiver is a small dedicated USB wireless receiver, based on the nRF24L-family of RF devices, [1] that allows up to six compatible Logitech human interface devices (such as mice, trackballs, touchpads, and keyboards; headphones are not compatible) to be linked to the same computer using 2 ...