Microcomputer Based Measurement and Simulation for Introductory Acoustics

该程序利用微型计算机测量和记录时间分辨的声学信号，并对真实物理系统中的驻波和传播声波进行建模。正在为两门面向非理科专业的声学课程开发新的实验室实验和模拟，这两门课程分别名为音乐声学和电子声学物理。新设备包括六台带有声卡的微型计算机、一台联网的激光打印机和六台带有计算机接口的数字合成函数发生器。在实验室实验中，用微型计算机对稳态和暂态声音信号进行记录和分析。正在开发软件，以计算和显示具有实际物理意义的模拟中的波浪振荡，例如管乐器内的驻波以及弦和膜的机械振动。复杂的函数发生器与微型计算机接口，以便于进行与频率相关的测量，例如测试扬声器和放大器响应。该项目扩展了一个非常成功的入门声学实验室，该实验室结合了快速傅立叶变换频谱分析仪来对音乐声音进行频率分析。学生能够从时间和频率的互补角度，以同样的精确度和精确度研究重要的声学现象，这将使学生受益。

This program utilizes microcomputers to measure and record time- resolved acoustical signals and to model standing and propagating acoustic waves in real physical systems. New laboratory experiments and simulations are being developed for two acoustics courses open to non-science-majors, entitled Musical Acoustics and Physics of Electronic Sound. The new equipment includes six microcomputers with sound cards, a networked laser printer, and six computer-interfaced, digitally synthesized function generators. In laboratory experiments, steady-state and transient sound signals are recorded and analyzed with microcomputers. Software is being developed to calculate and display wave oscillations in simulations of real physical significance, such as standing waves inside wind instruments and mechanical vibrations of strings and membranes. Sophisticated function generators are interfaced to microcomputers to facilitate frequency-dependence measurements, such as tests of loudspeakers and amplifier response. The program extends a highly successful introductory acoustics laboratory that incorporated fast Fourier transform spectrum analyzers to frequency analyze musical sounds. Students can benefit from the ability to study with equal precision and accuracy important acoustical phenomena from the complementary perspectives of time and frequency.