Bose QC 20 User Manual

For internal and reseller distribution only – Bose confidential.
CC011967_NRT Nautilus QA R3 3
3
Bose
®
QC
®
20 Acoustic Noise Cancelling
®
headphones
Bose
®
QC
®
20i Acoustic Noise Cancelling
®
headphones
What is full-spectrum noise reduction?
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
®
20 and 20i
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).
What is electronic noise floor?
Noise floor is the electronic “hiss” that may be heard when listening to
noise reduction headphones in a quiet environment. The QC
®
20 and 20i
headphones use sophisticated electronic circuitry to minimize noise floor.
Why do QC
®
20 and 20i Acoustic
Noise Cancelling
®
headphones use
digital technology when previous
Bose
®
QuietComfort
®
headphones
did not?
We make conscious decisions about which technology is used in each of
our products. In order to create a small-sized, in-ear Acoustic Noise
Cancelling
®
headphone with Bose
®
noise reduction, we used an
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
®
20
and 20i headphones reduces this delay to negligible levels, allowing
these small in-ear headphones to offer noise reduction rivaling any full-
sized headphone.
GENERAL PRODUCT INFORMATION
What are the QC
®
20 and 20i Acoustic
Noise Cancelling
®
headphones?
The QC
®
20 and 20i headphones are the first in-ear noise cancelling
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
®
headphones, these in-ear headphones are also
ideal for air travel, providing noise reduction while maintaining our
acclaimed audio quality and comfortable fit.

Bose QC 20 Specifications

General

Brand	Bose
Model	QC 20
Category	Headphone
Language	English