Bose QC 20 Q&R - Page 3

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Bose

What is full-spectrum noise reduction?

What is electronic noise floor?

Why do QC

20 and 20i Acoustic

Noise Cancelling

digital technology when previous

Bose

QuietComfort

did not?

GENERAL PRODUCT INFORMATION

What are the QC

20 and 20i Acoustic

Noise Cancelling

For internal and reseller distribution only – Bose confidential.

Acoustic Noise Cancelling

20i

Acoustic Noise Cancelling

Think of a piano keyboard as the full spectrum of human hearing, from

the low notes at one end, to the midrange notes in the middle, to the

high notes at the opposite end. Through a combination of advanced

active electronics and passive attenuation, the QC

headphones reduce noise across the full range of human hearing (all of

the keys on the keyboard). Other noise reduction headphones may be

effective at only some frequencies (only some of the keys on the full

keyboard).

Noise floor is the electronic "hiss" that may be heard when listening to

noise reduction headphones in a quiet environment. The QC

headphones use sophisticated electronic circuitry to minimize noise floor.

We make conscious decisions about which technology is used in each of

headphones use

our products. In order to create a small-sized, in-ear Acoustic Noise

Cancelling

headphones

advanced digital electronic chip. It allows the circuit board to be much

smaller, because we are able to use fewer electronic components than

before. To reduce noise cancellation to a single digital chip, the analog

outputs of microphones must be converted into digital signals. In the past,

converting these signals with the precision needed for high fidelity and

low noise floor added delay, which compromised performance by

slowing the ability to quickly react to noise. The new technology in QC

and 20i headphones reduces this delay to negligible levels, allowing

these small in-ear headphones to offer noise reduction rivaling any full-

sized headphone.

The QC

headphones?

headphones from Bose, and have been designed to let the user enjoy

their music wherever they go. They deliver an unexpected level of audio

performance and noise reduction, yet are small enough to fit in a pocket.

These headphones are the most versatile headphones Bose makes, giving

the user the option to enjoy a fully immersive musical experience or

enabling them to hear their surroundings while still enjoying their music. As

with other QuietComfort

ideal for air travel, providing noise reduction while maintaining our

acclaimed audio quality and comfortable fit.

headphones

headphone with Bose

20 and 20i headphones are the first in-ear noise cancelling

headphones, these in-ear headphones are also

20 and 20i

noise reduction, we used an

CC011967_NRT Nautilus QA R3 3

20 and 20i