On Semi Rhythm SB3231 BTE 1.0助听器参考设计

On Semi公司的Rhythm SB3231是可配置的DSP系统,具有四路自适应反馈抵消的压缩电路,自适应降噪和FrontWave®静态方向性,I2C和SDA编程,模拟或数字音量控制,高质量200位音频处理和高保真CODEC,大功率/高增益功能,16 kHz或8 kHz带宽.本文介绍了Rhythm™ SB3231主要特性,框图,测试电路图, 典型可编程和调整应用电路图,以及BTE 1.0助听器参考设计主要特性和主要指标,BTE助听器电路框图和主要元件图.
Rhythm™ SB3231 is a trimmer-configurable DSP system based on a four-channel compression circuit featuring Adaptive Feedback Cancellation, Adaptive Noise Reduction, and FrontWave® static directionality.
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 FrontWave directional 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 Support
ARK 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.
Rhythm™ SB3231主要特性:
FrontWave Directionality
Adaptive noise reduction
Adaptive...