http://www.noisefreeheadphones.com . The new JVC HA-NC250 combines outstanding sound quality with advanced noise-canceling and isolation technologies to provide a superior listening experience. The HA-NC250s noise cancellation circuitry includes feedback technology that constantly monitors the noise cancellation process. As a result, the headphones eliminate up to 85 percent of extraneous background noise. To further block noise, the HA-NC250 offers two JVC innovations that help isolate the listener from outside sounds. First, each earpiece employs a double housing structure for an extra sound insulation layer. Second, JVC developed a new technique for attaching the headphones smooth memory foam cushioned ear pads to the housing that helps isolate background noise. The smooth pads also enhance comfort.

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