Koss Noise Cancellation Headphones - QZ77
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About this item
About this item
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The QZ77 Stereophone features both Active Noise Reduction (ANR) technology and Passive Noise Reduction (PNR) technology which eliminate harmful and unwanted noise while still providing the ultimate in stereo sound- The ANR technology utilizes tiny microphones embedded in the ear piece- These microphones sample the surrounding low-frequency noise and transmit information about those undesirable sounds to a processing circuit- The processing circuit in turn generates mirror image ''anti-waves'' that are 180 degrees out of phase and relays those anti-waves back to the stereophone- When the offending sound waves encounter the waves generated by the QZ77 the two counteract each other at the wearer's ear- The offending hum and buzz is reduced and a peaceful listening environment is created where once there was noise- Low frequency noise below 1000 Hz such as jet bus or automotive engines is reduced by an average of 10 dB- Noise reduction is even greater for noise below 200 Hz offering a 15 dB of protection against low frequency noise- Designed after another popular Koss model The Plug the stereo earbud features a dynamic element that is positioned just outside the ear- The element is connected to a tubular port structure that is inserted on a soft expandable cushion into the ear canal- Soft foam ''memory'' cushions expand for a custom fit to improve isolation and enhance deep bass and treble clarity- Utilizing the fit and mechanical design of the headphone to reduce noise is known as Passive Noise Reduction (PNR)- While the ANR circuit reduces low frequency noise the PNR reduces high and mid frequencies so music and voice can be heard in absolute clarity- Double noise reduction and maximum sound performance all in one complete product- SKU: TBAL5778
|Shipping Weight (in pounds):||5.69|
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