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2. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   In a noisy environment, both microphones receive noise at a similar level, but the primary mic receives the desired sounds more strongly. Thus if one signal is subtracted from the other (in the simplest sense, by connecting the microphones out of phase) much of the noise is canceled while the desired sound is retained.

3. Apple headphones - Wikipedia

   en.wikipedia.org/wiki/Apple_headphones

   A variant without a microphone shipped only with the third-generation iPod shuffle. Apple In-Ear Headphones. Apple In-Ear Headphones were introduced on September 9, 2008, intended as a premium option compared to Apple's bundled earbuds. Like the regular earbuds they have a remote control and microphone built-in.

4. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   General 3.5 mm computer headsets come with two 3.5 mm connectors: one connecting to the microphone jack and one connecting to the headphone/speaker jack of the computer. 3.5 mm computer headsets connect to the computer via a sound card, which converts the digital signal of the computer to an analog signal for the headset. USB computer headsets ...

5. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   Website. www .bluetooth .com. A Bluetooth earbud, an earphone and microphone that communicates with a cellphone using the Bluetooth protocol. Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs).

6. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   Singer Cody Simpson using a wireless microphone headset in a 2013 concert in Montreal. A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone, it has a small, battery-powered radio ...

7. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headphones are also known as earphones [1] or, colloquially, cans. [2] Circumaural (around the ear) and supra-aural (over the ear) headphones use a band over the top of the head to hold the drivers in place. Another type, known as earbuds or earpieces, [1] consists of individual units that plug into the user's ear canal.