JVC HAEBR80B, HAS400W, HAS400B, HAFX5B Special technology for HA-NC250, Technology, to block, noise

Special technology for HA-NC250

●	Sound-insulating ear pads
	Soft memory foam cushions
●
	with extremely smooth surface
●
	ear pads that fit exactly on
Technology	your ears create a seal to
	block background noise.
to block
noise

Dual housing structure

Dual acoustic wall blocks incoming background noise.

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Equipped with advanced noise cancellation technology

●Advanced noise cancelling with “feedback technology”

●Standard noise cancelling

Technology to reduce 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.

	Microphone
			An additional amount of
			anti-phase sound is added to
		Detected	reduce noise; the microphone
			monitors noise continuously.
Anti-phase sound is		noise
						Remaining noise is
added to reduce
						almost eliminated.
noise; however				Reduced	noise
the microphone
picks up
neighbouring noise.

Add anti-phase sound to reduce noise

Microphone

Detected noise

Reduced noise

Noise wave

Anti-phase wave

Noise wave

Anti-phase wave