| 纯音听力计中纯音信号发生器的设计与实现 |
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| 引用本文： | 李莹,钟波.纯音听力计中纯音信号发生器的设计与实现[J].计算机测量与控制,2010,18(3). |
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| 作者姓名： | 李莹 钟波 |
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| 作者单位： | 1. 北京航空航天大学,计算机学院,北京,100191
2. 中国计量科学研究院,力学与声学所,北京,100013 |
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| 摘 要： | 纯音听力计是进行听觉功能测试的基本声学仪器,而纯音信号发生器是其最重要的组成模块,它决定着可控声源的质量,直接影响测试结果的准确性;文章分析了现有纯音信号发生器存在的问题,提出了一种基于微处理器ATMEG128的设计与实现方法;该发生器可生成频率在125Hz~8kHz、听力级为-10~120dB的精密纯音信号;其中,频率按1/3倍频程输出,听力级的最小调节精度可达0.5 dB,符合国家标准。
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| 关 键 词： | 纯音信号发生器 单片机 DDS 音量控制器 |
Design and Implementation of Pure-tone Signal Generator in Audiometer |
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| Li Ying,Zhong Bo.Design and Implementation of Pure-tone Signal Generator in Audiometer[J].Computer Measurement & Control,2010,18(3). |
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| Authors: | Li Ying Zhong Bo |
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| Affiliation: | 1.School of Computer and Engineering/a>;Beihang University/a>;Beijing 100191/a>;China/a>;2.Division of Mechanics and Acoustics/a>;National Institute of Metrology/a>;Beijing 100013/a>;China |
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| Abstract: | Pure-tone audiometer is a kind of acoustic instruments dealing with measurement of hearing.Pure-tone signal generator is the most important design module.It decides the quality of the sound source and directly affects the accuracy of test results.The article analyzes the problems of existing pure-tone signal generator and presents the design and implementation method based on microprocessor ATMEG128.This pure-tone generator can output precise pure-tone signal whose frequency range is 125 Hz-8 kHz and hearin... |
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| Keywords: | pure-tone signal generator MCU DDS volume controller |
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