Rhythm™ SB3231 is a trimmer-configurable DSP system based on a four-channel compression circuit featuring Adaptive Feedback Cancellation, Adaptive Noise Reduction, and Directional Processing.Based on a phase cancellation method, Rhythm SB3231's adaptive feedback reduction algorithm provides added stable gain to enable extra gain and user comfort. It features rapid adjustment for dynamic feedback situations and resistance to tonal inputs. The directional processing system utilizes a pair of microphones to create a fully customizable static polar pattern, such as bidirectional, cardiod, hyper-cardiod and super-cardiod.In addition to these adaptive algorithms, Rhythm SB3231 also supports the following features: up to four channel WDRC, low-distortion compression limiting, cross fading between audio paths for click-free memory changes, eight-band graphic equalizer, eight configurable generic biquad filters, programming speed enhancements, in-channel squelch to attenuate microphone and circuit noise in quiet environments, optional peak clipping, flexible compression adjustments, volume control, rocker switch, noise generation for tinnitus treatment, and industry leading security features to avoid cloning and software piracy.Software SupportARK is a set of software building blocks that can help reduce the time it takes to develop hearing aid fitting software. ARKonline is an efficient web-based tool for creating product libraries and keeping them organized. To access ARKonline, please go towww.onsemi.com/arkonline.