JVC HAS150RN Headphones User Manual


 
Technology
to block
noise
Technology
to reduce
noise
Special technology for HA-NC250
Equipped with advanced
noise cancellation technology
Sound-insulating ear pads
Soft memory foam cushions
with extremely smooth surface
ear pads that fit exactly on
your ears create a seal to
block background noise.
Dual housing structure
Dual acoustic wall blocks
incoming background noise.
Even after reducing background
noise, some will remain.
A microphone close to the driver
unit picks up such remaining
noise and the feedback circuit
produces the appropriate
amount of additional anti-phase
sound. Every nuance of audio
becomes clear through this
feedback technology.
21
Advanced noise cancelling with “feedback technology”
Standard noise cancelling
Microphone
Reduced noise
Microphone
Reduced noise
Detected
noise
Noise wave
Anti-phase wave
Noise wave
Anti-phase wave
Anti-phase sound is
added to reduce
noise; however
the microphone
picks up
neighbouring noise.
An additional amount of
anti-phase sound is added to
reduce noise; the microphone
monitors noise continuously.
Remaining noise is
almost eliminated.
Add anti-phase
sound to
reduce noise
Detected
noise