1.Noise cancelling headphone 2.ANR is Active Noise Reducing 3.PNR :Passive noise control is simple 4.Eight color for chose

ANR technology, also called active noise reduction technology, in some place you’ll see active noise cancellation (ANC) technology, is corresponding to passive noise canceling technology. Active noise reduction is a relatively new technology that is especially effective at reducing low frequency noise, such as the engine and propeller noise in a light aircraft.

Some people may worry about that dose it mean an ANR headset will leave only silence so that we are unable to hear the important things going on around us. How about instructions from tower controllers or he hum of the engine which lets us know everything is as it should be?

ANR works most effectively on low-frequency noise and does very little to affect the relatively higher

frequencies of, for example, voices. The low-frequency is the most annoying part of noise which makes permanent hearing loss across all frequencies especially after you experienced a long time fly. In addition, it really only works well for tonal noises those sounds containing a very limited number of frequencies,

  such as propeller noise; so you still hear broadband, mixed frequency sounds, such as the wind flowing

  over the airframe. You can also tell when a sound changes. So, if the rhythmic pulse of the propeller is altered by the addition or loss of power, your ears will still tell you.

PNR Technology

Passive noise control is simple. It works by muffling noise.The simple is that you put your hands over your ears.Passive headsets use special material to produce the domes,thick earpads,often of gel or foam,to create a seal around each ear.And the shape of the dome also makes sense to the noise insulating.

Aviation headset/Air plane headset with noisy cancelling with pnr aviation headset and anr aviatian headset