BLUAEC-IN Soundweb London AEC Acoustic Echo Cancellation Input Card


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The Soundweb London Acoustic Echo Cancellation (AEC) Input Cards are designed to populate any of the four card slots on Soundweb London BLU-800, BLU-320, BLU-160 and BLU-120 devices. These AEC Input Cards enable Soundweb London devices to cancel acoustic echo arising when sound from a loudspeaker enters a microphone in the same room in a conference application.

Like the Soundweb London Analog Input Cards, the Soundweb London AEC Input Cards offer Phantom Power, configurable per channel and software controlled analog gain in 6 dB steps from 0 dB to 48 dB.

They offer four independent channels of AEC which can be freely configured in software and individual AEC references allowing users to provide a solution for multiple spaces using a single device.

Automatic Gain Control (AGC) ensures that the inputs of the microphones are set at the optimum level. Noise Cancellation (NC) removes steady state noise (such as from a projector fan or air conditioning device) from the signal path. This stops the noise from being amplified.

Non-Linear Processing (NLP) dynamically adjusts to minimize echo caused by under or over-cancellation.

The Soundweb London AEC Input Cards also offer a direct microphone feed for local sound reinforcement. This allows full-bandwidth, low latency, direct microphone signals to be mixed and processed for local sound reinforcement purposes.

• Compatible with BLU-800, BLU-320, BLU-160 and BLU-120 Devices
• Phantom Power (Configurable per Channel)
• Software Controlled Analog Gain (0 dB to 48 dB, 6 dB steps)
• Four Independent Channels of AEC
• Individual Reference per Channel
• Automatic Gain Control (AGC)
• Noise Cancellation (NC)
• Non-Linear Processing (NLP)
• Direct Microphone Feed for Local Sound Reinforcement



Analog Inputs: Up to 16 electronically balanced on Phoenix/Combicon removable screw connectors
Mic/Line Inputs: Nominal gain 0 dB, electronically switchable up to +48 dB, in +6 dB steps
Input Impedance: 3.5kO
Maximum Input Level: +20 dBu with 0 dB input gain, +8 dBu with 12 dB gain
CMRR: >75 dB at 1 kHz
Input Noise (E.I.N.): <-128 dBu typical with 150O source
Phantom Power: 48V nominal, selectable per input
Pre-AEC Input Latency: 38/Fs [0.79 ms @ 48 k]
Post-AEC Input Latency (Original 8k Algorithm): 2385/Fs [49.68 ms @ 48 k]
Post-AEC Input Latency (Full Bandwidth Algorithm): 1609/Fs [33.52 ms @ 48 k]
Tail Length: 200 ms
Average Convergence Rate: 49 dB/s (Net convergence over multiple FFT bands)
More Information
Weight 0.500000
Length 10
Width 6.5
Height 4
Compatibility Soundweb London BLU-800, BLU-805, BLU-806, BLU-320, BLU-325, BLU-326, BLU-160 and BLU-120
Manufacturer BSS by HARMAN
Manufacturer Model Number BLUAEC-IN
Manufacturer Part Number BLUAEC-IN
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