本文研究工作是针对治疗耳鸣的背景，以实现性价比高、性能稳定、应用范围广、高频信号的输出波形失真小和频率精确度高的耳鸣诊断治疗系统为目标，提出基于掩蔽疗法的治疗耳鸣的设计方案。 为了实现耳鸣诊疗系统的处方、频率和强度的可调，系统硬件电路设计了声音存储模块、信号调理模块、声强控制模块、功率放大模块和显示模块。耳鸣诊疗系统采用DDS算法和播放存储卡数据来发生信号，使用T形衰减器和π形衰减器对声音信号无源高精度衰减并结合功率放大模块驱动耳机发声。为满足医院对机号和治疗时间显示的要求，选用HOLTEK HT1621 LCD，为实现大量处方信号的存储选用AT45DB161D。 为了符合医院患者信息管理的规定，满足医院患者信息管理的需要，并达到操作过程中的直观、方便、实用、安全等要求，上位机选用了可视化的编程环境C++ Builder。主要实现患者问诊、诊断和治疗功能模块的编程、患者信息的保存和显示、打印、友情的提示和帮助功能。所有的患者信息都保存到SQL数据库中，选用Teechart控件生成的曲线分析患者检测数据，QReport协同数据库一起操作，生成医院需要的报表打印。在患者的照片处理上采用了VFW(Video for Windows)实现了视频捕获，利用AVICap窗口类支持实时捕获视频流和捕获单帧，并提供对视频源的控制。 所设计的智能化耳鸣诊断治疗系统具有系统运行稳定、操作方便、性价比高和疗效明确等优点，已经在山西某医院使用，各种技术指标达到了医学的要求。

In the thesis, we form a scheme to design a system for curing and diagnosing tinnitus using mainly tinnitus masking therapy. The system should have many advantages such as high ratio of price, stability, wide applications, and high accurate frequency. This design is to adjust recipe, frequency and intensity. The instrument hardware mainly designs power modules, single chip microcomputer, and power amplifier module. Radio frequency power attenuator is the key part of this equipment, whose performance determines the accuracy of the test. The HT1621LCD displays the time of the parent’s treatment. The aperiodic signals are stored in the large memory of AT45DB161D. The main function is signal generation, signal extraction, signal attenuation and signal amplifier. In order to realize patient information administration systematization, normalization and automation, the upper computer uses visual programming environment C++ Builder. The multiple interface form of upper computer mainly includes main interface, testing interface, treat interface, print interface, patient query interface, case record interface etc. The upper computer program is firmly in accordance with patient’s treatment process. All the patients’ data are stored into the database. In our project, this paper can get the curves from the Teechart control to analyze patients’ testing data. Besides, the QRrport works together with the database to generate our own statement easily. This paper applies VFW (Video for Windows) to edit patients’ photos to obtain Video Capture. AVICap window is used to support real-time video streaming and single frame capture so as to control video source. The intelligent instrument has been put into operation in a hospital. Various technical indicators have reached the medical requirements. Practice shows that the whole system moves stably and works efficiently, the process is reasonable, and the function is completed.