Fundamentals of Audio and Music Engineering: Part 1 Musical Sound & Electronics

开始时间: 待定 持续时间: Unknown

所在平台: Coursera

课程类别: 工程

大学或机构: University of Rochester(罗切斯特大学)

授课老师: Mark Bocko Robert Clark

   

课程主页: https://www.coursera.org/course/audiomusicengpart1

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课程评论: 1 个评论

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课程详情

This 6-week course is for students who are interested in learning the basic concepts of sound & acoustics and signals & electronics as they relate to music. The goal is for students to understand the basic concepts and principles of musical acoustics and electronics and to learn how equipment such as electric guitars, amplifiers, and loudspeakers are designed and operate. Students are encouraged to put the theory into practice by building a simple guitar practice amplifier. The course employs high-school level algebra and trigonometry, no calculus is required. 

课程大纲

Week 1 

Lesson 1: Introduction to oscillations and sound waves, simple oscillating systems, sound pressure, sound waves, the speed of sound, wavelength, frequency and pitch, sound pressure level, loudness, making sound, properties of musical sound versus “noise”

Lesson 2: Electronics fundamentals - charge, current, voltage, power, resistance, Ohm’s law, DC circuits, finding currents and voltages in simple circuits

Week 2 

Lesson 1: Reflection and absorption of sound, resonances in air columns, resonances in enclosures and rooms, diffraction and diffusion of sound, reverberation, principles of designing a good music studio

Lesson 2:  AC signals, phase and complex numbers, capacitors, inductors, transformers, impedance, AC circuits and AC circuit analysis, simple filters (high-pass, low-pass, band-pass)

Week 3 

Lesson 1: Transistors, vacuum tubes, opamps, amplification, power gain, single-stage amplifiers

Lesson 2: Converting sound to electrical signals –microphones and guitar pickups, converting electrical signals to sound – loudspeakers   

Week 4  

Lesson 1: Electric guitar electronics, pickup design, pickup placement and tone, volume control circuits, tone control circuits

Lesson 2:  Overview of a simple guitar amplifier, power supply, volume control, preamp, tone control, power amp section

Week 5

Lesson 1: Designing speaker enclosures, basic principles, interaction of speaker driver with the cabinet, why a cabinet at all? 

Lesson 2: Speaker designs for home stereo, crossover networks, guitar amplifier (open) speaker enclosures, bass amplifier (closed and vented) speaker enclosures

Week 6

Lesson 1:  Building the guitar amplifier, how to solder, getting the amp to work - systematic testing and troubleshooting 

Lesson 2: Visualizing sound waves, frequency content and tone, signal modification in electro-acoustic systems, tube amplifiers and distortion, wah pedal, talk box

课程评论(1条)

2

wzyer 2013-08-01 14:28 2 票支持; 0 票反对

这是一门偏应用,且目标明确的课程。老师一开始就说了所有学生最后会利用这门课上学到的东西来制作一个吉他放大器。因此整门课都围绕着声音的采集,处理与输出来展开,相应的,这里的知识结构也就集中于电子电路,信号处理,以及声学。虽然看似覆盖面很广,但因为关注点明确,所以难度并不显得高。而且,工程问题自有工程的处理方法,你完全不必担心学习进程会被理论问题所阻碍。当然,如果你上课之前能够具备一点基础知识,那一定能更多的享受音乐工程的乐趣。

好吧,说说我具体都学到了什么。要做一个吉他放大器,首先是音频的采集:这里只需要一个简单的电路将弦的振动转化为电信号。接下来的部分是小信号的放大,还是简单的电路。之后是声音的变调,渲染,这里主要要用到一点信号处理的知识,数学上来说主要就是傅里叶变换。然后加上音量控制,电路部分就完成了。最后是物理输出部分——音箱,这里要考虑到高频声波与低频声波的特点,音响的尺寸与喇叭的尺寸等等很多物理关系。不过,你也可以完全不必关注这些具体理论,因为网上已经有人把这些公式做好了,在网页上就能根据设计要求直接得出各种参数,然后留给你的工作就是:锯木板,粘音箱——注意这里一定要用粘的,千万不能用钉子哦,老师特别强调了的。

关于老师的讲解,我觉得这里的音频信号处理部分讲的非常好,形象生动,深入浅出。原始声音听起来如何?只取第一项傅里叶变换后听起来如何?两项,三项呢?更多项呢?这些问题你都能用你的耳朵感受到,而不仅仅是纸面上的公式。这是很多其他信号处理课上不多见的。还有声学的部分,音箱中的驻波什么的也都有非常漂亮的演示,连我这样一个上过多年物理的人都被深深吸引。

如果你对音响工程有兴趣,那么这门课是绝对不能错过的。

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课程简介

In this course students learn the basic concepts of acoustics and electronics and how they can applied to understand musical sound and make music with electronic instruments. Topics include: sound waves, musical sound, basic electronics, and applications of these basic principles in amplifiers and speaker design.

课程标签

音频 音乐 音乐工程 音频与音乐工程 音频与音乐工程上 音频与音乐工程基础 罗切斯特大学

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