ANF II: noise filtering device

Portable noise filtering and audio recording station

Noise filtering device ANF II
Noise filtering device ANF II
Noise filtering device ANF II
Noise filtering device ANF II
Noise filtering device ANF II
Product Library:

Overview

In high-stress situations, such as accidents, criminal investigations, and conditions where safety and security are a concern, it is important for speech to be clear and easily understandable to ensure no vital information is lost. The ANF II is designed to meet the toughest tasks of speech enhancement, including real-time enhancement.

Highlights

  • Real-time and post processing
  • Nine noise suppression filters
  • Remote control via web-interface
  • Ability to save original and processed audio

Features and functions

  • Broadband Noise Filter
    • Smoothes suppression of noises in all bandwidths
    • Low frequency rumble suppression
    • Enhancement of reverberated speech
  • Harmonic Reject Filter
    • Suppresses electric network frequency, phone beeps, or any other drones
  • Adaptive Equalizer
    • Improves spectrum and enhances speech in the “poor” audio channel
  • 4 Parametric Equalizer
    • Amplifies / weakens low and high frequencies
  • Speech Level Enhancer
    • Smoothes down amplitude differences and amplifies speech of a distant speaker
  • De-Clicker
    • Eliminates cracks / clicks in radio channels and old discs
  • Reference Noise Filter
    • Suppresses noise in the main channel using information about the noise from the reference channel
  • V-Changer
    • Changes speaker’s voice in real time and processes files

Functions

  • 9 proprietary noise processing: broadband noise filter (3 modes), harmonic reject filter, equalizer (2 modes), de-clicker, speech level enhancer, reference noise filter
  • Network interface
  • Sound input from built-in mics, line analog inputs, digital inputs, and phone lines;
  • Recording can be started / stopped manually or automatically (time schedule and voice activation)
  • Audio storage on the flash card.
  • Unlimited number of filtering presets

Technical specification

Signal sources (stereo): External microphones
Built-in microphones
Line inputs
Interfaces Analog line balanced/unbalanced inputs: XLR/TRS connector
Analog line balanced/unbalanced outputs: ¼” TRS connector
Digital input/output: Coaxial S/PDIF format RCA connector
Telephone input/output: RJ-11 connector
Headphones output: ¼” stereo TRS connector
Network: Ethernet 10/100 BASE-TX
PC interface: USB 5-pin Mini
Digital filters Broadband noise filter
Harmonic reject filterv
Adaptive EQ
Parametric EQ
De-clicker
Speech level enhancer
Stereo filter
Voice changing filter
Input level indication two 7 LED bars
Built-in loudspeaker 1 mono
Power 4хR6 (1,5V AA)
12- 24V from external adaptor
Flash card SDHC up to 32 Gb
Dimension 7.9” W х 5.6” D х 2.6” H
Weight 2.9 lbs

Examples of cleaned audios

  • Houston, we've got a problem... (Appolo 13), April 13, 1970
    Original: original / Cleaned: cleaned
  • Spectral corruption
    Original: original / Cleaned: cleaned
  • Power supply
    Original: original / Cleaned: cleaned
  • First man on the Moon
    Original: original / Cleaned: cleaned