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After about 10 years of research and development Bose released their first consumer level noise reducing headphones for pilots called the ''Aviation Headset,'' released in 1989. The current revision provides active equalization as well as active noise reduction.
After about 10 years of research and development Bose released their first consumer level noise reducing headphones for pilots called the ''Aviation Headset,'' released in 1989. The current revision provides active equalization as well as active noise reduction.
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Like all such technology, it mixes an inverted sample of the ambient sound outside the headset with the sound that reaches the inside of the headset, partially cancelling out the noise. Active (battery-powered) noise cancellation is never perfect, and is better at low frequencies than at high frequencies.{{Fact|date=January 2007}}
Like all such technology, it mixes an inverted sample of the ambient sound outside the headset with the sound that reaches the inside of the headset, partially cancelling out the noise. Active (battery-powered) noise cancellation is never perfect, and is better at low frequencies than at high frequencies.{{Fact|date=January 2007}}
On [[11 January]] [[2008]], Engadget revealed that Bose was going to release a [[Bluetooth]] adapter for the QC3. No information was given on a QC2 Bluetooth version.<ref>Retrieved from http://www.engadget.com/2008/01/11/bose-goes-wireless-with-bluetooth-kit-for-quietcomfort-3/.</ref>
On [[11 January]] [[2008]], Engadget revealed that Bose was going to release a [[Bluetooth]] adapter for the QC3. No information was given on a QC2 Bluetooth version.<ref>Retrieved from http://www.engadget.com/2008/01/11/bose-goes-wireless-with-bluetooth-kit-for-quietcomfort-3/.</ref>
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===Bose QuietComfort 15 Headphones===
===Bose QuietComfort 15 Headphones===
