ANEM Operating Manual
ANEM Operating Manual
Page 5
1.
Introduction.
Figure 1. Noise cancellation.
Original signal.
Speech with a lot of
background noise
Processed speech.
Speech with reduced
noise
Speech Noise
Reduced noise
Features:
Noise reduction
9 – 35dB
Tone reduction
4 – 65 dB
Power supply
12 – 18 V dc
Input signal
> 50mV
Output load
2.5W 8ohm
Current consumption
300mA
Audio bandwidth
50 – 4.3KHz
Dimensions (WxDxH)
100 x 60 x 40mm
4 or 8 filter levels (selectable)
Visual and audio indication of filter level
Audio bypass when switched off
Headphone/speaker switch
The bhi DSP processes the incoming signal and then
differentiates the speech from the noise. The unwanted
noise and interference is then attenuated to leave only
the speech. The following diagrams are taken from actual
audio signals and illustrate how the signal is being
processed.
1.2 DSP Noise cancellation.
Page 24
6. Other bhi products
6.1 NES10-2 MK3 Noise Eliminating Speaker.
6.
Other bhi products.
Other noise cancellation products from bhi. Visit www.bhi-ltd.com
for more information:
Features:
•
Fully adaptive noise cancellation 9 -35dB
•
8 user selectable noise cancellation levels
•
Mono earpiece socket
•
Input sensitivity control
•
Noise cancellation On/Off switch
•
LED indication of power and noise cancellation
•
12-24VDC operation
•
On/Off audio bypass switch.
•
Easy to install with adjustable mounting bracket
•
2m audio lead
•
Optional extras avaiable.
Amplified DSP noise cancellation speaker with
new rotary filtter select knob and increased
audio power.
6.2 DSPKR
Features:
•
7 DSP filter levels 9 - 24dB
•
12-18V DC operation
•
Simple control of all functions
•
sleep mode - Filter store function
•
Volume control - Input level indicator
•
Comes with 2m audio lead, Fused DC power lead & manual
Superb 10 Watt rms audio
DSP noise cancelling
speaker
