BHI NCH User manual
Features:
Comfortable over-ear style headphones
Active noise cancelling: 12 - 15dB
Magnet: Neodymium
Frequency Response: 20 - 20,000 Hz
Maximum Input: 40 mW
Sensitivity: 110 dB
Impedance: 32 ohms
Weight: 190g (incl’ battery)
Cable length: 1.25 m (detachable)
Supplied with 1 x AAA alkaline battery
Battery life 45 hours
Order code: NCH
Contents: NCH noise cancelling headphones, 1 x AAA alkaline battery.
Description:
The bhi NCH active noise cancelling headphones (ANC) reduce ambient background
noise enabling you to have a more enjoyable listening experience. The over-ear
style NCH headphones also give good passive audio isolation from external noise.
They are an excellent choice for those wanting to reduce aircraft cabin noise, air
conditioning noise, train noise, ambient background noise and similar types of
continuous environmental noise so that they can enjoy a much improved listening
experience. They are especially good to use on a train or airplane whilst listening to
audio or watching a video.
The adjustable headband and soft over-ear pads make sure that the headphones
are a comfortable fit. The NCH headphones require one AAA alkaline battery
(supplied) and the active noise cancellation can be easily switched on and off with
the simple switch, and a green LED indicates whether it is active or not.
Note: Avoid wearing headphones when driving, cycling or any activity that requires
quick reactions or when your hearing must not be impaired. Do not wear your
headphones for extended periods of time at high volumes as this may damage your
hearing.
bhi Ltd, 22 Woolven Close, Burgess Hill, West Sussex, RH15 9RR, UK
NCH
Active Noise Cancelling Headphones
1. Remove the AAA battery from the bubble packaging.
2. Fit the AAA battery into the “R” side of the headphones.
3. Pull down the battery cover as in picture 1.
4. Lift up the cover to expose the battery housing as in picture 2.
5. Push the AAA battery into the housing correctly. Make sure the polarity of the
battery lines up with the marks on the housing.
6. Close the battery housing as in picture 4 and push the cover up until it clicks
into place.
7. Switch the “ON/OFF” switch on the “L” side of the headphone to “ON”. The
green LED should light as in picture 5.
8. Make sure that the 3.5mm stereo headphone lead is connected to the
Headphone socket on the “L” side and audio source prior to use.
Troubleshooting:
1. Noise reduction not working –Make sure the noise cancelling switch is on
and the LED is lit green. If not check the AAA battery is ok.
2. Low volume –Ensure that the audio source is playing and that the volume
is turned up sufficiently, and check that the 3.5mm stereo plug is
connected properly in the audio source and headphone socket.
3. Crackling noise or poor audio quality –Make sure that the connections to
the headphones and audio source are secure. Replace the AAA battery.
4. Rumbling sound –Adjust the headphones to correctly fit comfortably on
your head and ears. Can be caused if the earcups port holes are blocked.
Change the AAA battery.
WEEE Statement
Weee Statement for correct disposal of this product: (Applicable in the European Union
and other European countries with separate collection systems). This marking shown on
the product or its literature, indicates that it should not be disposed of with other household
wastes at the end of its working life. To prevent possible harm to the environment or
human health from uncontrolled waste disposal, please separate this from other types of wastes and
recycle it responsibly to promote the sustainable reuse of material resources. Household users should
contact either the retailer where they purchased this product, or their local government office, for
details of where and how they can take this item for environmentally safe recycling. Business users
should contact their supplier and check the terms and conditions of the purchase contract. This
product should not be mixed with other commercial wastes for disposal.
5
1
4
3
2
Instructions:
bhi Ltd, 22 Woolven Close, Burgess Hill, West Sussex, RH15 9RR, UK
Table of contents
Other BHI Headphones manuals
