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Bose
QuietComfort
®
Acoustic Noise Cancelling
FREQUENTLY ASKED QUESTIONS
PRODUCT TECHNOLOGY
What is Acoustic Noise Cancelling
headphone technology?
For internal and reseller distribution only – Bose confidential
25
®
headphones
®
Bose QuietComfort 25
Acoustic Noise Cancelling headphones.
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 earcups monitor
sound at the user's ear and externally. 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 earcup's microphone) and the
sound the user wants to hear (music or silence) is noise. The electronics in
the QuietComfort 25 Acoustic Noise Cancelling headphones 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 earcup 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 earcup 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 nearly cancel each other (1 + -1 = 0),
providing a clean, high-fidelity sound signal at the ear.
1
.
CC013997 QC25 FAQ 5.6.14
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Table of Contents
Related Manuals for Bose QuietComfort 25
Summary of Contents for Bose QuietComfort 25
- Page 1 (from the earcup’s microphone) and the sound the user wants to hear (music or silence) is noise. The electronics in the QuietComfort 25 Acoustic Noise Cancelling headphones instantly process the noise signal, and a precise equal and opposite signal (correction signal) is created.
- Page 2 TriPort acoustic headphone structure is used in all of our consumer headphones and headsets. How is the total noise cancellation in The QuietComfort 25 headphones utilize both active and passive noise the QuietComfort 25 Acoustic Noise reduction technologies. They use a sophisticated proprietary electronics...
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Page 3: General Product Information
Many Bose retail outlets provide an opportunity to listen to the product. Bose also offers a 30-day trial, so you can see how the product performs in real life. When you do, we believe you will appreciate the Bose difference resulting from proprietary technology and expertise developed over three decades of research. - Page 4 QuietComfort 25 Acoustic Noise cancellation nor Active EQ is able to function. Audio performance in the Cancelling headphones provide when unpowered state is similar to that of Bose audio headphones (such as the listening to unpowered audio? Bose AE2 audio headphones).
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Page 5: Parts Information
However, we also know that when consumers are looking for the best in terms of performance and quality, Bose products not only deliver, but they also do so at a great value. How much is the shipping and handling? Standard shipping and handling costs may vary according to sales channel. - Page 6 No. The earlier QuietComfort 2 and QuietComfort 15 headphones are not remote and microphone compatible with compatible with this cable. my QuietComfort 2 and/or QuietComfort 15 headphones? For internal and reseller distribution only – Bose confidential CC013997 QC25 FAQ 5.6.14...
- Page 7 The cable with inline music player or mobile phone? remote and microphone included with the Bose QuietComfort 25 Acoustic Noise Cancelling headphones is designed for use with most iPod, iPhone or iPad models.
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Page 8: Product Usage
The QuietComfort 25 Acoustic Noise Cancelling headphones are do I know that it will function with my designed and built by Bose to exacting standards. The headphones have iPod, iPhone or iPad correctly? received Apple certification to confirm they are compatible with select iPod, iPhone and iPad models. - Page 9 However, passengers may enjoy using QuietComfort 25 Acoustic Noise Cancelling headphones while riding in an automobile to remove engine and road noise.
- Page 10 “Wireless” is an industry term used for headphones? electronics that transmit information via radio frequency – the electronics in QuietComfort 25 headphones do not do this. How many batteries do the headphones To operate the headphones, one 1.5V AAA size Alkaline or Lithium primary need? battery is needed.
- Page 11 AAA compared to alkaline batteries shortens the useful run time of the batteries by approximately 20%. The use of NiMH low-self discharge AAA size batteries is a good match for the QuietComfort 25 Acoustic Noise Cancelling headphones for customers who prefer to use rechargeable batteries.
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Page 12: Product Differentiation
The Bose QuietComfort 25 headphones feature a new look from previous QuietComfort headphones. They maintain the comfort of the previous generation while improving audio and noise reduction performance. A pivot was added to allow for a significant reduction in the size of the headphone while stored in its case. - Page 13 Bose ® audio found in headphones – QuietComfort 25 headphones utilize Active EQ to headphones? closely match the Bose target curve for headphone audio. In addition, the noise reduction technology allows you to enjoy your music with less distraction from noise around you;...
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Page 14: Product Specifications
With the Bose Corporation 30-day trial period, we can suggest consumers try the QuietComfort 25 headphones personally to see if they experience an improvement. For internal and reseller distribution only – Bose confidential... -
Page 15: Legal Disclaimer
Retina are trademarks of Apple Inc., registered in the U.S. and other countries. iPad Air and iPad mini are trademarks of Apple Inc. The trademark “iPhone” is used with a license from Aiphone K.K. For internal and reseller distribution only – Bose confidential CC013997 QC25 FAQ 5.6.14...