Bose QC 20 User Manual

For internal and reseller distribution only – Bose confidential.
CC011967_NRT Nautilus QA R3 3
1
Bose
®
QC
®
20 Acoustic Noise Cancelling
®
headphones
Bose
®
QC
®
20i Acoustic Noise Cancelling
®
headphones
FREQUENTLY ASKED QUESTIONS
PRODUCT TECHNOLOGY
What is Acoustic Noise Cancelling
®
headphone technology?
Acoustic Noise Cancelling
®
headphone technology is a method of
reducing unwanted noise by electronically creating a signal that is the
mirror image of the unwanted noise. Microphones in the earbuds monitor
sound at the user’s ear. The monitored sound (music and noise) is
compared to the sound the user wants to hear (the signal coming from
the audio input – this could be music or silence). The difference between
the monitored sound (from the earbud’s microphones) and the sound the
user wants to hear (music or silence) is noise. The system electronics
instantly process the noise signal, and a precise equal and opposite signal
(correction signal) is created. This opposite signal is then sent to the
speaker in the earbud along with the sound the user wants to hear
(again, this could be music or silence). The result is three signals being
presented to the user’s ear:
1. Noise (monitored by the earbud microphones) from the environment.
2. The sound the user wants to hear (music or silence) from the audio
input.
3. The correction signal from the system electronics.
The noise and correction signal cancel each other (1 + -1 = 0), providing
a clean, high-fidelity sound signal at the ear.
FPO
QC
®
20
Acoustic Noise Cancelling
®
headphones.

Bose QC 20 Specifications

General

Type	In-ear
Noise Cancelling	Yes
Microphone	Yes
Battery Life	Up to 16 hours
Connectivity	Wired
Weight	44 g
Cable Length	1.3 meters

Summary

Product Technology Overview

Acoustic Noise Cancelling Technology

Explains Acoustic Noise Cancelling headphone technology, including active and passive noise reduction.

Noise Cancellation and Audio Modes

Total Noise Cancellation Explained

Details how QC20/20i use active and passive noise reduction technologies for full-spectrum noise reduction.

Aware Mode Functionality

Explains Aware mode, which uses microphones to let users hear surroundings while listening to audio.

TriPort Headphone Technology

Describes TriPort technology using external ports to enlarge acoustic volume for better audio and noise reduction.

Active EQ Explained

Defines Active EQ as electronically tuning frequency response for lifelike audio performance.

Advanced Technology and Product Features

Full-Spectrum Noise Reduction

Explains noise reduction across the full hearing range using active electronics and passive attenuation.

Digital Technology in QC20/20i

Explains use of digital chip for smaller size, fewer components, and reduced delay for better noise reduction.

QC20/20i Headphones Overview

Introduces QC20/20i as Bose's first in-ear noise cancelling headphones, highlighting versatility and performance.

Headphone Usage and Comparisons

QC20 vs QC20i Differences

Explains QC20/20i design for audio use, with QC20i offering inline remote controls for Apple devices.

Noise Cancellation Effectiveness

States effectiveness depends on environment, but headphones reduce noise even without users wearing them.

Comfort, Warranty, and Cost

Price Justification

Explains higher price due to Bose's commitment to quality, research, patented technologies, and customer satisfaction.

Shipping, Returns, and Included Items

Smartphone Compatibility (QC20)

Confirms QC20 compatibility with most Android™, Windows®, and BlackBerry® smartphones.

Compatibility and Controls

Apple Product Compatibility (QC20i)

Confirms QC20i compatibility with select Apple products due to Bose certification.

QC20i Specifics and Microphone

Inline Remote Control Functions

Details remote functions: volume, play/pause, track skip, call answer/end, voice commands.

Microphone Type and Placement

Describes omnidirectional inline microphone at the Y-joint for optimal performance.

Battery and Ear Tip Information

StayHear+ Tip Benefits

Highlights StayHear+ tips for unique soft silicone material, improved stability, and comfort.

Ear Tip Usage and Fit

Stable Fit with StayHear+ Tips

Inserting Earphones Correctly

Product Differentiation and Safety

Noise Reduction Comparison

Compares noise attenuation of QC20/20i to QC15, noting differences in active/passive balance.

Audio Performance Comparison

Highlights QC20/20i enhanced audio performance and noise reduction due to Active EQ and TriPort.

Active EQ and Sound Quality

Explains Active EQ and TriPort enable Bose audio target matching for lifelike sound, even unpowered.

Aviation Headset Standards