Polycom SoundStructure C16 Design Manual page 658

Feedback Reduction filter
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Sound Reinforcement Mic/Line Input
Virt Chans Mono, Stereo
System Limits Minimum: 0.03, Maximum: 1.0, Resolution: 0.01
Default 0.1
User Limits No
Supported
Event Source No
Description
This parameter sets the bandwidth (in octaves) for all the filters of the feedback reduction algorithm.
Enable Filter Decay Mode In Feedback Reduction
Argument Argument value
Channel Type Virtual Channel
Value Type Boolean
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Sound Reinforcement Mic/Line Input
Virt Chans Mono, Stereo
Default 0
Event Source No
Description
This parameter enables (1) or disables (0) filter decay mode for the feedback reduction algorithm. If filter
decay mode is enabled, the adaptive notch filters can slowly decay to 0 dB if no singing is detected at that
frequency. This mode is useful in rooms with high noise or where there is a lot of motion.
Polycom, Inc.
Bandwidth—fb_filter_bandwidth
Algorithm—fb_filter_decay_en
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