PHYSICS OF MUSIC

Instructor:
Dr. Paulo Bedaque
2105 John S. Toll Physics Building
bedaque@umd.edu

Teaching Assistants:
Mark Strother
subwaytovenus@comcast.net



Course Policies:
There will be three tests worth 30% of the final grade each. Homework will count as 10%. An alternative to a test will be arranged in case health problems prevent a student to attend a test (with a written notice of the doctor).

Office hours:
Mondays and Wednesdays from 10:00 to 11:00 am or any other time previously arranged with the instructor.

Textbook:
Berg and Stork, The Physics of Sound, third edition

Homework:
homework 1
due before class on February 15th solution
homework 2
due before class on February 27th solution
homework 3 due before cass on March 14th solution
homework 4 due before class on March 31th solution
homework 5 due before class on April 28th

Tests:
midterm 1 (a)
(b)
midterm 2

Slides from lectures

These slides are supposed to be complementary to what we discuss in class so they are not meant as a substitute to attending classes, taking notes and reading the book. Still, you may find them useful. Another problem is that some of the animations are not included in the powerpoint file. They do not contain many words and explanations.

Slides for the classes up to Feb. 8th
Slides for classes up to Feb. 18th
Slides for the classes on Fouries analysis, up to Feb. 22nd
Slides for the classe on the decibel scale, up to March 14th
Slides for the classes on standing waves, normal modes and resonance, up to March 26th
Slides for the classes on humar hearing, up to  April 2nd
Slides for the class on the human voice, April 4th
Slides for the review session on April 7th and 9th
Slides for the room acoustics classes, up to April 25th
Slides for the music theory, temperament classes
Slides for the hardware (louspeakers, digital recording) classes
Slides for the classes on instruments
Slides for the last review session

Interesting Links:

Is it true that sound diffraction changed the result of the Civil War ? Find out at Echoes Winter.
Sounds Amazing is a great website with explanations and (virtual) hands on demonstrations of many of the topics we weill cover in class. highly recommended.
The Soundry: interesting website with animated demonstrations of the physics of sound
You can find the oscilloscope software (and other goodies) here .
The movie about interference shown in class is here.
The interference applet is here.
The Doppler effect applet is here.
The Fourier series applet is here.
The spectrograph used in class is available here.
A shareware multitone generator is available here.
An interesting collection of  sound illusions.
Two great BBC audio documentaries about sound, consoncances/dissonances, ...



Tentative Syllabus
Jan. 28 Introduction Berg&Stork
Jan. 30 What is sound ?
Feb. 1
Pressure

Feb.4 Sound speed

Feb. 6 Properties of waves:  reflection, diffraction, ... Chapter 2.2
Feb. 8 Properties of waves:  inverse square law, ... Chapter 2.2
Feb. 11 Periodic motion: harmonic oscillators Chapter 1
Feb. 13 Addition of sound and interference,  superposition of  simple waves Chapter 2.4
Feb. 15 Doppler effect Chapter 2.6
Feb. 18 Diffraction
Chapter 2.3
Feb. 20 Fourier Analysis Chapter 4.1
Feb. 22 Fourier Analysis, Tone quality Chapter 4.2
Feb. 25 Tone quality Chapter 4.3
Feb. 27 Review
Feb. 29 EXAM I
Mar. 3 Discussion of test #1
Mar. 5 decibel scale Chapter 6.3
Mar. 7 decibel scale
Chapter 6.4
Mar. 10 Normal modes of vibration: strings
Chapter 3
Mar. 12 Normal modes of vibration and resonance Chapter 3
Mar. 14 Normal modes of vibration and resonance Chapter 3
Mar. 24 Normal modes in tubes
Chapter 3.4
Mar. 26 Human hearing Chapter 6.1-6.11
Mar. 28 Human hearing Chapter 6.1-6.11
Mar. 31 Sound localization Chapter 6.1-6.11
Apr. 2 Sound localization Chapter 6.1-6.11
Apr. 4 The human voice Chapter 6.12-6.13
Apr. 7 Review

Apr. 9 Review
Apr. 11 EXAM II
Apr. 14 Dicussion of Midterm II
Apr. 16 Consonance and dissonance

Apr. 18 Temperaments Chapter 9.1, 9.2, 9.3, 9.7
Apr. 21 Temperaments Chapter 9.1, 9.2, 9.3, 9.7
Apr. 23 Auditorium acoustics Chapter 8.1-8.5
Apr. 25 Auditorium acoustics Chapter 8.1-8.5
Apr. 28 Loudspeakers Chapter 8.1-8.5
May 2 Digital recording
May 5 String instruments Chapter 12
May 7 String instruments Chapter 12
May 9 Wind instruments

May 12 Review