Description
Acoustic Echo Cancellation for AHM-64
The Acoustic Echo Cancellation (AEC) module for AHM-64 provides 12 channels of AEC and is designed for teleconferencing and videoconferencing scenarios.
The AEC processors are assigned using channel inserts in the AHM-64. One insert sits in the far-end Input channel, and the other in the near-end Input channel.
A Sound Reinforcement output is also provided for cases where local voice reinforcement is required.
Features
- AEC (Acoustic Echo Cancelling) module for AHM-64
- 12 channels of AEC
- 150ms FIR Adaptive Filter
- Far-end AGC (Automatic Gain Control)
- Residual echo NLP (non-linear processing)
- Background noise reduction
- Near-end gating
- Speech-shaped comfort noise
Specifications
INPUTS
- Mic/Line Inputs Balanced, +48V phantom power
- Mic/Line Preamp Fully recallable
- Input Sensitivity -60 to +15dBu
- Analogue Gain +5 to +60dB, 1dB steps
- Pad -20dB Active PAD
- Maximum Input Level +30dBu (PAD in)
- Input Impedance >3kΩ (Pad out), >8kΩ (Pad in)
- Mic EIN -127dB with 150? source
OUTPUTS
- Analogue Outputs Balanced, Relay protected
- Output Impedance <75Ω
- Nominal Output +4dBu = 0dB meter reading
- Maximum Output Level +22dBu
- Residual Output Noise
- -94dBu (muted, 20-20kHz)
- -92dBu (muted, 20-40kHz)
SYSTEM
Measured balanced XLR in to XLR out, 20-20kHz, +5dB Gain, Pad out, signal @ 0dB (meter)
- Dynamic Range 110dB
- System Signal to Noise -94dB
- Frequency Response 20Hz - 25kHz +0/-0.8dB
- THD+N (analogue in to out) 0.005% @ +16dBu output, 1kHz +5dB gain
- Headroom +18dB
- Sampling Rate 96kHz +/- 20 PPM
- Playback
- Internal Storage ~3GB
- File types Mono/stereo .WAV (16/24bit, 44.1/48/96kHz), MP3, FLAC
- Operating Temperature Range 0 deg C to 40 deg C (32 deg F to 104 deg F)
- Mains Power 100-240V AC, 50-60Hz, 70W max
- DC Power 12VDC - 5A minimum capable supply
DIMENSIONS AND WEIGHTS
Width x Depth x Height x Weight
- AHM-64 482.6mm x 364mm x 91.2mm (19” x 14.3” x 3.6”) x 7kg (15.5lbs)
- AHM-64 Boxed 600 x 500 x 180 mm (23.6” x 19.7”x 7.1”) x 9.5kg (21lbs)
