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Sound Surveillance tm
Description
Four channel, low cost background noise
reduction module for use with ETS
microphones and DVRs, etc. Provides
boost of frequencies in the human voice
band (1.7Khz) and10db per octave
attenuation on both sides of the band pass.
The result is significantly reduced
background noise and increased
intelligibility of speech.
VNF-4 Four Channel
Voice Notch Filter
Microphone Interface
Includes
• VNF-4 Filter / interface
• 12 VDC AC adapter.
• 4 each 3’ RCA or 3.5mm patch
cables.
• Installation instructions.
Options
• SPECIFY: RCA OR 3.5mm
input / output connectors.
Wiring Requirements
• Microphone cable run: Stranded 22-
gauge, 2-conductor shielded cable.
Distances up to 1500 feet.
VNF-4 Specifications
• RCA or 3.5mm output connectors
(specify upon ordering).
• Line level outputs (0db).
• Provides X2 gain at 1.7Khz and 10db /
Octave attenuation above and below
center frequency.
• Adjustable output level control for each
channel.
•
Euro-style connectors makes cable
terminations fast and clean.
• Power: 12VDC @ 80mA.
• Reverse polarity protected and fused.
• Dimensions: L 4.3 x W 2.7 x H 1.6.
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