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Sennheiser electronic GmbH & Co. KG ( / ˈzɛnhaɪzər /, German pronunciation: [zɛnˈhaɪ̯zɐ]) is a German audio equipment manufacturer headquartered in Wedemark. Sennheiser specializes in equipment for both the consumer and professional audio markets, including microphones, headphones, and loudspeakers . Founded in 1945 by Fritz Sennheiser ...
Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...
It is best known for its home audio systems and speakers, noise-canceling headphones, professional audio products, and automobile sound systems. [6] [7] [8] Bose has a reputation for being particularly protective of its patents, trademarks, and brands. The majority owner of Bose Corporation is the Massachusetts Institute of Technology.
Headsets are available in single-earpiece and double-earpiece designs. Double-earpiece headsets may support stereo sound or use the same monaural audio channel for both ears. Single-earpiece headsets free up one ear, allowing better awareness of surroundings. Telephone headsets are monaural, even for double-earpiece designs, because telephone ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
The 140 series of Federal Information Processing Standards ( FIPS) are U.S. government computer security standards that specify requirements for cryptographic modules . As of October 2020, FIPS 140-2 and FIPS 140-3 are both accepted as current and active. [ 1] FIPS 140-3 was approved on March 22, 2019 as the successor to FIPS 140-2 and became ...
QuietComfort 25. Bose QuietComfort 25 with mounted 3.5 mm headphone jack, and carry case. The "QuietComfort 25" (QC25) over-ear headphones were sold from 2014 until 2019. The "QuietComfort 25" (QC25) over-ear headphones were released in 2014 [ 36] as the replacement for the QuietComfort 15.
The Cessna 120, 140, and 140A, are single-engine, two-seat, conventional landing gear (tailwheel), light general aviation aircraft that were first produced in 1946, immediately following the end of World War II. Production ended in 1951, and was succeeded in 1959 by the Cessna 150, a similar two-seat trainer which introduced tricycle gear.