Koss Noise Cancellation Headphones - QZ77

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Reduces harmful and annoying low frequency sounds in noisy environments - ideal for in-flight use Unique earbud design directs sound into the ear canal for deep bassSpecialty ear cushion material forms slowly in the ear canal to provide a custom fit and maximum isolationFrequency response: 10-20kHzI

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.
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

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.

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

Specifications

Shipping Weight (in pounds): 5.69
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Customer Reviews

Customer Reviews | 1 review | 2 out of 5

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Noise reduction
1/25/2014

Customer review by Bellaluna2648

2.0 stars 1/25/2014 by Bellaluna2648
by Bellaluna2648
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Didn't lower machinery noise levels

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Bellaluna2648
Would recommend to a friend? No
Age:55 - 64
Ownership:1 week or less
Gender:Male
Usage:Never
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Customer Reviews | 1 review | 2 out of 5

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