【摘要】 本文提出了一种以单片机和高性能芯片为核心研制的全数控听觉测试仪。它输出的高精度频率和高纯度正弦信号,在频率和幅度上均采用数控。并利用单片机对耳机本身频率响应进行修正,使得显示的分贝数即为实际的分贝数。另外,各按钮均采用触摸式按钮,使得其操作简单、方便,适合于各种听觉方面的测试和教学,尤其是在医学中,对人耳频率特性和人体阻抗特性的研究和教学极为方便。更多还原

【Abstract】 A digital-controlled measuring instrument for hearing,which is based on a single-chip microcomputer and highly integrated device,is introduced in this paper.It may output highly accurate and purified sine signal whose frequency and amplitude are controlled by digital.Specially,the displaying number of decibel is equal to actual number of decibel,because frequency response of earphone is corrected by software of microchip.Besides,touching buttons,which is simple and convenience for users,is selected.So this instrument is convenient to measure and teach about hearing,specially,research and study on frequency characteristic of human ear and impedance characteristic of human body in medical science.更多还原