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2. Cordless telephone - Wikipedia

   en.wikipedia.org/wiki/Cordless_telephone

   Analog equivalents do exist and can provide longer reach, but with potential loss of confidentiality and voice quality. The cordless phone handset connects to a wireless access point or base station that supports the same technology. Also required is a call management function and a gateway to the public switched telephone network (PSTN). This ...

3. Audio headset - Wikipedia

   en.wikipedia.org/wiki/Audio_headset

   Mobile (cellular) phone headsets are often referred to as handsfree. Older mobile phones used a single earphone with a microphone module connected in the cable. For music-playing mobile phones, manufacturers may bundle stereo earphones with a microphone. There are also third-party brands which may provide better sound quality or wireless ...

4. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...

5. List of Bose headphones - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_headphones

   The "QuietComfort 20" (QC20) and QC20i in-ear headphones were released in 2015 and are the company's first in-ear noise cancelling headphones. [19] It received a 2014 Red Dot Design Award. [20] Also, it received a CNET 's Editors' Choice Award of 4.5/5 points for its active noise-cancelling. [21]

6. List of discontinued Bose headphones - Wikipedia

   en.wikipedia.org/wiki/List_of_discontinued_Bose...

   Therefore, noise isolation is less effective than Canalphones [12] The audio quality of the IE2 was judged to be outperformed by other models in its price class. [13] The MIE2 and MIE2i were sold from 2010 until 2015. [14] [15] The MIE2 headset is the same as the IE2 headphones, but with a microphone added so that it operates as a cellphone ...

7. History of the telephone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone

   The acoustic tin can telephone, or "lovers' phone", has been known for centuries. [1] It connects two diaphragms with a taut string or wire, which transmits sound by mechanical vibrations from one to the other along the wire (and not by a modulated electric current). The classic example is the children's toy made by connecting the bottoms of ...

8. Telephone - Wikipedia

   en.wikipedia.org/wiki/Telephone

   An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically ...

9. Jabra (brand) - Wikipedia

   en.wikipedia.org/wiki/Jabra_(brand)

   Jabra's wireless earbuds range, September 2023. Jabra is a Danish brand specializing in audio equipment and videoconferencing systems. It is owned by GN Audio, a division of the Danish company GN Group. [4] Jabra engineers, manufactures, and markets wireless, true wireless, and corded headphones for consumers and business customers.