BHI NCH active noise cancelling headphones

The bhi NCH headphones do not work like our other DSP noise cancelling products but use active noise-cancelling technology (ANC) to reduce distracting background noise, providing a comfortable and restful listening environment in areas with high ambient noise. The NCH noise-cancelling headphones feature a miniature microphone in the earpiece that picks up ambient noise (like traffic noise and aircraft cabin noise). The electronics in the ear piece invert the ambient noise by 180° out of phase with the external ambient noise. This has the effect of cancelling out the annoying ambient noise without diminishing the audio you are listening to, resulting in much improved listening experience.

Comfortable over-ear style headphones
Active noise cancelling: 12 to 15dB
Impedance 32 Ohm
Magnet: Neodymium
On/Off switch with LED
1.25m detachable cable with 3.5mm jack plug (both ends)
Supply: AAA battery (supplied)
Frequency Response: 20 - 20,000 Hz
Maximum Input: 40 mW
Sensitivity: 110 dB
Weight: 190g (incl’ battery)
Battery life 45 hours