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Enhance your listening experience and reduce unwanted ambient noise by 87.4 percent with the MDR-NC7 noise canceling headphones. Featuring a convenient, foldable and swivel design, these headphones are perfect for travel or the daily commute.
Noise canceling headphones reduce ambient noise to provide a quieter environment for audio entertainment. The headphones have an inside microphone on each earpiece that works with electronic circuitry to create oppositely phased sound waves that reduce, or phase out, the ambient noise sound waves.
The MDR-NC7 reduce up to 87.4% (9 dB at 300 Hz) of ambient noise when the noise canceling circuit is switched on, ideal for loud, noisy environments like planes, buses, dorms, etc.
Convenient dual-use capability gives you the option of listening to your music with or without the noise cancelation feature, so you can enjoy unaffected music in quiet environments. This also allows you to keep using your headphones (minus noise reduction) when the batteries run dry.
Many of the noise canceling headphones out there are earbuds; these are ideal for someone who prefers an external phone. The phones rest gently on your ear, with an adjustable headband to get a good fit. And good sound--a neodymium magnet provides excellent power-handling, and 30-millimeter drivers deliver quality sound with a frequency response of 20 Hz - 30 kHz.
The MDR-NC7's noise reduction is powered by a single AAA battery, and when not in use the phones feature a foldable, swivel design. Fold small and compact and slip into the included carry pouch and you're good to go. An airplane adapter is also included for in-flight entertainment (stereo or dual jack).
| Driver Unit: | 30 mm |
| Frequency Response: | 20 Hz - 30 kHz |
| Magnet: | Neodymium |
| Impedance, Power On: | 33 Ohms |
| Impedance, Power Off: | 100 Ohms |
| Sensitivity, Power On: | 102 dB/mW |
| Sensitivity, Power Off: | 100 dB/mW |
| Plug Type: | Gold, Stereo Mini Plug |
| Cord Length: | 1.5 Meters |
| Weight: | 134 grams (Including AAA Battery) |
MDR-NC7 Noise Canceling Headphones, Airplane Plug Adapter, Carrying Pouch, User's Manual
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Recipients of our phone calls reported no annoying disturbances or distortions during conversation, and audio quality on our end was clear as well, if a bit muffled. The headset works best on phones that feature good volume controls, because the microphone adjust switch raises and lowers the volume in a very narrow range.
The M175 also has the nifty feature of converting from a headband to an over-the-ear-style headset. Unfortunately, this also makes for a somewhat flimsy construction. Pieces immediately began falling off the unit as soon as we removed it from its packaging, though snapping the components back in place took little effort.
Overall, the Plantronics M175 headset is a versatile, quality headset for those looking for a hands-free way to work with their mobile or cordless phones. --John Frederick Moore
Pros:
Cons:
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| Drive Unit (mm): | 40 |
| Impedance: | 71 (on) 26 (off) |
| Sensitivity (dB/mW): | 96 |
| Max. input (mW): | 1,000 |
| Frequency Response (Hz-kHz): | 10 - 30 |
| Cord length (ft): | 4.9 |
| Weight w/o cord (oz): | 6.8 |
| In-cord Volume: | No |
| Miniplug (3.5mm): | Yes |
| Air Plug Adaptor: | Yes |
| Magnet Type: | Nd:Neodymium |
| Plug: | Gold |
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