Noise filtering device ANF II

The ANF II produces professional results while being intuitive and easy-to-use, requiring no special knowledge in digital sound processing. Adaptive noise filters yield immediate results and allow adjustments to be instantly audible. All settings and controls can be adjusted via the front panel of the device, remotely via web-interface, or from the computer via USB cable.

Highlights

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

Applications

• Speech enhancement for supervisory services
• Audio surveillance and recording
• Noise filtering server for audio forensic labs
• Court trials recording and witnesses’ voice changing
• Broadcasting and post production

• 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

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
• Telephone input/output: RJ-11 connector
• Headphones output: ¼” stereo TRS connector
• Network: Ethernet 10/100 BASE-TX
• PC interface: USB 5-pin Mini
•  

Audio format:

• Audio compression: PCM, muLaw
• Audio sample rate: 8, 16, 44.1 kHz
• Audio bit depth: 16, 24 bits
• THD for line inputs: 0.1% max

Digital filters:

• Broadband noise filter
• Harmonic reject filter
• 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: 4хAA batteries or 12 – 24V from external adapter
Flash card: SDHC up to 32 Gb 
Dimensions: 7.9” W х 5.6” D х 2.6” H
Weight: 2.9 lbs