Our rating:
Sony MDR-NC40 review
Shut out up to 90% of the ambient noise around you with the MDR-NC40 noise
canceling headphone. Great for work, traveling or just when you’re
trying to sleep in a loud place, they provide a calming atmosphere no
matter where you are. The pressure-relieving cushion offers premium
comfort, and the lightweight, folding design makes storing them a breeze.
Includes a premium travel case and "AAA" batteries.
Ideal for: Loud, noisy environments – planes, trains, buses, work or
dorms.
Plug adapter: A supplied plug adapter connects directly to stereo or dual
jack of in-flight music services. 3
Noise canceling technology: Noise canceling headphones reduce ambient noise
and provide a quieter environment to enhance audio entertainment. The
headphones have an inside microphone on each earpiece that work with an
electronic circuitry to create an opposite sound wave to reduce wave.
Ambient sound is reduced by synthesizing with a sound in opposite phase
produced by the noise canceling circuit.
Unique feature: Lightweight design with a built-in monitor function allows
you to hear surrounding sound without taking off the headphones. Perfect
for listening to announcements, flight attendants, or any external sound
without the need to take the headphones off.
Design: Soft and comfortable on-ear fit with pressure-relieving urethane
ear cushions. Super compact foldable design for carrying and storing in the
included premium travel case.
Noise reduction: Reduces noise up to 90% (10 dB at 300 Hz) when noise
canceling circuit is switched on 1 .
Passive function: The headphones can operate as passive headphones when the
noise canceling circuit is not activated. It allows the headphone to
function as regular stereo headphones without using the battery.
Battery: Small battery box for “AAA” battery.
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