Rhythm R3710预配置DSP混合系统重点详析

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Rhythm R3710 description
          Rhythm R3710 is a pre−configured DSP system designed specifically for Invisible−In−Canal (IIC) hearing aid devices. Available in the industry’s smallest hybrid form−factor, it is well suited for hearing aid designs that are placed deep in the ear canal. Using miniaturized advanced packaging techniques, ON Semiconductor enables hearing aid manufacturers to take advantage of the highly compact size to produce IIC hearing aids that fit a greater portion of the market. Featuring iSceneDetectenvironmental classification, adaptive noise reduction, feedback cancellation, and up to 8−channel WDRC, Rhythm R3710 provides the advanced features and performance level typically found in high−end products.
           
          Acoustic Environment Classification − The iSceneDetect environmental classification algorithm is capable of analyzing the hearing aid user’s acoustic environment and automatically optimizes the hearing aid to maximize comfort and audibility.
           
          iLog6.0 Datalogging − Enables the recording of various hearing aid parameters such as program selection, volume setting and ambient sound levels. The sampling interval can be configured to record from every 4 seconds up to once every 60 minutes. The fitting system can present the data to help the fitting specialist fine tune the hearing aid and counsel the wearer during follow up visits.
           
          Evoke Advanced Acoustic Indicators − Allows manufacturers to provide more pleasing, multi−frequency tones simulating musical notes or chords to indicate events such as program or volume changes.
           
          Adaptive Feedback Canceller − Automatically reduces acoustic feedback and allows for an increase in the stable gain while minimizing artifacts for music and tonal input signals.
           
          Adaptive Noise Reduction − Rhythm R3710’s adaptive noise reduction algorithm monitors noise levels independently in 128 individual bands and employs advanced psychoacoustic models to provide user comfort.
           
          Tinnitus Masking − Rhythm R3710 is equipped with a noise source that can be used to mask tinnitus. The noise can be shaped, attenuated, and duty cycled then summed into the audio path either before or after the volume control.
           
          In−situ Tone and Noise Generator − The narrow−band noise and tone stimulus feature can be used for in−situ validation of the hearing aid fitting. The frequency, level and duration of the stimuli are individually adjustable.
           
          Other Key Features − Rhythm R3710 also supports the following features: built−in feedback path measurement,cross fading between audio paths for click−free program changes, 16−band graphic equalizer, 8 generic biquad filters (configurable as parametric or other filter types), programming speed enhancements, optional peak clipping, flexible compression adjustments, direct interfaces to analog or digital volume control, rocker switch, direct audio input and telecoil. Rhythm R3710 also encompasses industry−leading security features to avoid cloning and software piracy.
           
          Features

       

•                 Advanced Research Algorithms:        
  
•                 iSceneDetect Environmental Classification        
  
•                 128−band Adaptive Noise Reduction        
  
•                 Adaptive Feedback Cancellation (AFC)        
  
•                 Log 6.0 Datalogging        
  
•                 Tinnitus Masking Noise Generator        
  
•                 Evoke Acoustic Indicators        
  
•                 1, 2, 4, 6 or 8 Channel WDRC        
  
•                 Feedback Path Measurement Tool        
  
•                 AGC−O with Variable Threshold, Time Constants, and Optional Adaptive      Release        
  
•                 16−band Graphic Equalizer        
  
•                 Narrow−Band Noise Stimulus        
  
•                 SDA or I2C Programming        
  
•                 8 Biquadratic Filters        
  
•                 2 Analog Inputs        
  
•                 16 kHz or 8 kHz Bandwidth        
  
•                 4 Fully Configurable Memories with Audible Memory Change Indicator        
  
•                 96 dB Input Dynamic Range with HRXHeadroom
  

           
          Extension

       

•                 128−bit Fingerprint Security System and Other Security
  

          Features to Protect Against Device Cloning and
          Software Piracy

       

•                 High Fidelity Audio CODEC        
  
•                 Soft Acoustic Fade between Memory Changes        
  
•                 Drives Zero−Bias 2−Terminal Receivers        
  
•                 Internal or External Digital Volume Control with
  

          Programmable Range

       

•                 Rocker Switch Support        
  
•                 20−bit Audio Processing        
  
•                 thinSTAX Packaging        
  
•                 E1 RoHS Compliant Hybrid
  

           
          thinSTAX Packaging
          Hybrid Typical Dimensions:0.180 x 0.123 x 0.060 in.
          (nominal)(4.57 x 3.12 x 1.52 mm)
           

       

        PAD CONNECTION

         

       

        MARKING DIAGRAM

         

       

        Figure 1. Hybrid Block Diagram

           
          推荐阅读：

       

•                 Rhythm R3710预配置DSP系统整体概述
  

          摘 要：Rhythm R3710是一款专门针对IIC助听器而设计的预配置数字信号处理器(DSP)系统，适合深耳道应用。这器件采用安森美半导体先进的thinSTAX微型 封装，以堆叠式芯片架构将多个芯片及元件封装在混合模块中，提供业界最小混合模块外形因数，使助听器制造商能够利用这极小尺寸的优势，生产适合更大部分消 费者 的IIC助听器。
           

       

•                 Rhythm R3710预配置DSP系统设计所需规范详析
  

          摘 要：Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the recommended Operating Conditions is not.
           

       

•                 Rhythm R3710预配置DSP系统实践应用指南
  

          摘 要：The iSceneDetect feature, when enabled, will sense the environment and automatically control the enhancement algorithms without any user involvement.