EF400 Acoustic Echo Canceller

Cancel Acoustic Echo and Ambient Background Noise

The EF400 is a stand-alone high quality acoustic echo canceller designed for simple set-up and automatic operation. Our superior AEC algorithm permits use of the EF400 in demanding environments. The EF400 is ideal for distance learning classrooms, conference rooms, courtrooms, and other audio or video conferencing applications where the acoustic conditions demand improved AEC performance.

The EF400 also includes our proprietary noise cancellation algorithm (patent pending). In addition to cancelling acoustic echoes, the EF400 now keeps ambient background noise from overpowering your transmitted audio. Noises such as HVAC, projector fans and rumble will no longer disrupt your meeting or class.

Fast 30 dB/second convergence and 200 msec "tail time" ensure good performance even in challenging rooms

Automatic training - no noise bursts or tones needed for set-up

Continuous adaptation to room conditions - no need to reset

Operates at higher room gain than other systems - up to +10dB (see application notes for details)

Supports muting without disabling AEC adaptation

Balanced, professional line level input and output (also accepts mic level input)

Unbalanced "Record" input and "Playback" output

Superior double-talk performance allows all parties to be heard simultaneously

Two-year warranty

Click here to download the EF400 spec sheet in Acrobat PDF format. (2 pages, 85K)
Download the EF400 User's Manual, also in Acrobat PDF format (183 kb).
Click here for Consultant specifications on this product

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Polycom Installed Voice Business Group
1720 Peachtree St. NW, Suite 220
Atlanta, GA 30309
404.892.3200
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