新闻中心

ON 安森美半导体推出可预配置的无线助听器DSP系统具有高达8 WDRC通道_ AYRE SA3291

 2013-05-08

【产品介绍】


为满足家庭保健及人们对健康、保健设备兴趣增高的需求,安森美半导体针对中国市场为医疗应用提供了用于助听器的预配置DSP及公开可编程DSP系统,帮助中国医疗电子产品制造商开发创新的高精度、可可靠性及低能耗医疗设备。同时,安森美半导体还提供配套软、硬件开发工具,协助客户实现芯片产品以外2次性开发,还有应用工程师团队为客户体供现场支持,帮助他们缩短设计周期,加快产品上市。

 

助听器主要分耳背式(Behind The Ear, BTE)和耳内式(In the Ear, ITE),适合不同年龄和不同需要的患者配戴。前者有传统BTE,微型BTE和耳道内置受话器(Receiver In Canal, RIC);而后者有全、3/4、半耳腔式ITE,耳道内置,深耳道(Completely In the Canal, CIC)及耳道内不可见(Invisible In Canal, IIC)等类型。其趋势有三:其一是分立及“不可见”,更小巧的耳道内置受话器(RIE)及新的耳道内不可见(IIC)类型在美国“婴儿潮”一代开始采用助听器时更受欢迎;其二是无线通信及连接:当前技术为2.4 GHz、900 MHz及带蓝牙继电器的近场磁感应(NFMI);其三是完全自动化及“智能”,音量控制及信号处理自动适配声音环境,因而更有效,令用户更方便。满足这些趋势分别需要转移至65 nm或更小节点工艺及微型化封装技术;需要互操作性及先进的封装技术;增加处理功率及算法复杂度。随之而来的设计挑战是功耗约1 V工作电压时的电流消耗、多芯片及芯片面积要小于10mm2、采用混合信号技术。

 

 


【产品特色】


安森美半导体为无线助听器应用提供预配置的DSP系统,包括Ayre SA3291混合模块及AYRE中转器参考设计等。这些预配置DSP系统提供多种混合选择及功能包,支持所有助听器产品类型,非常适合于要求极少编程配置、要求即可应用的助听器制造商。

 

其中,安森美半导体的Ayre SA3291混合模块采用完整特性的助听器算法套件、预配置听觉处理器和NFMI高带宽集成双工无线电,天线是唯一需要的外部元器件,并可同步左耳及右耳参数。而安森美半导体的Ayre中转器参考设计支持立体声音频流、持蓝牙、音量控制和程序选择。

 

安森美半导体的助听器数字信号处理软件具有几个明显的特性,如宽动态范围压缩,可柔和放大声音,且不会使增大的声音令人不适,可针对个体的听力减退情况提供个性化定制;反馈消除器可消除由反馈产生的部分助听器输出信号,并通过相位消除来自适应地消除;自适应方向可自动适配极性模式,根据噪声位置调节;利用环境分类持续分析声音环境,自动调节助听器将舒适度和可听性提升至最高。

 


【产品方块图】

 

 

【规格说明】

  • Binaural Synchronization: The binaural synchronization feature allows two hearing aids to wirelessly synchronize adjustments such as program modes or volume control. By working together as one system, user control is simplified.
  • Binaural Telecoil: The binaural telecoil wirelessly streams telecoil audio signals from one hearing aid to the other. This enables hearing aid users to hear phone calls in both ears, improving speech intelligibility.
  • Stereo Audio Streaming: Stereo audio signals can be streamed wirelessly from a relay device to hearing aids equipped with Ayre SA3291. A relay device can use Bluetooth or other far-field wireless technology to wirelessly connect with TVs, music players, mobile phones or other audio sources.
  • iSceneDetect Environment Classification: The environmental classification algorithm automatically optimizes the hearing aid to maximize comfort and audibility by analyzing the      hearing aid wearers acoustic environment.
  • Adaptive Noise Reduction: The adaptive noise reduction algorithm monitors noise levels independently in 128 individual bands and employs advanced psychoacoustic models to provide user comfort.
  • Tinnitus Masking: Comes equipped with internal noise generation for tinnitus treatment. The noise can be shaped and attenuated and then summed into the audio path either before or after the volume control.
  • Adaptive Feedback Cancellation: Automatically reduces acoustic feedback and allows for an increase in the stable gain while minimizing artifacts for music and tonal input signals.
  • Automatic Adaptive Directionality: The automatic Adaptive Directional Microphone      (ADM) algorithm automatically reduces the level of sound from sources originating behind or to the side of the hearing aid wearer, without affecting sounds from the front. The algorithm also reduces current consumption by gathering input from the acoustic environment and automatically selecting whether directionality is needed or not.

 

【产品参考文件】

 

Links

http://www.onsemi.com

 

Related Solutions Linkshttp://www.onsemi.cn/PowerSolutions/product.do?id=AYRE%20SA3291