Chapter 1 Introduction: “Is that a real subject?”
Chapter 2 Underpinnings I: Good vibrations
2.1.1 Linearity and sine waves
2.2 Frequency analysis and modes
2.2.1 Fourier series
2.2.2 The undamped harmonic oscillator
2.2.3 Linearity for small vibration
2.2.4 Degenerate modes of a drum
2.2.5 Vibration frequency response
2.2.6 Frequency spectrum of a hammer tap
2.2.7 Vibration damping
2.2.8 Impulse response and convolution
Chapter 3 When does a structure become a musical instrument?
3.1 Harmonics and non-harmonics
3.1.1 Vibration of an ideal stretched string
3.2 Building blocks: beams, plates and shells
3.2.1 Bending beams and free-free modes
3.2.2 Synthesising percussion sounds
3.2.3 Plate vibration
3.2.4 The modal density of a vibrating plate
3.2.5 Rayleigh’s principle
3.3.1 Rayleigh’s principle and tuning a marimba bar
3.4 Church bells
3.5 Steel pans and the musical saw
3.5.1 Time-average holography
3.5.2 Waveguide reflection: the beam on an elastic foundation
3.6 Tuned drums
3.6.1 Vibration modes of a circular drum
Chapter 4 Underpinnings II: Making waves
4.1 Sound waves
4.1.1 The wave equation
4.1.2 The sound field of a pulsating sphere
4.1.3 Energy, intensity and impedance
4.2.1 The Helmholtz resonator
4.2.2 Coupling of a Helmholtz resonator and a body mode
4.2.3 The Webster horn equation
4.2.4 Weinreich’s formula for modal density
4.3 Sound radiation
4.3.1 Monopoles and dipoles
4.3.2 The Rayleigh integral and the baffled piston
4.3.3 The critical frequency of a vibrating plate
Chapter 5 Strings, mainly plucked
5.1 Stringed instrument overview
5.1.1 Averaging and the coherence function
5.1.2 Coupling a string to the instrument body
5.2.1 Merit index for soundboard material selection
5.3 Signature modes and formants
5.3.1 The bridge hill: a resonator near the driving point
5.3.2 Skudrzyk’s method
5.4 Synthesising plucked string sounds
5.4.1 Motion of a plucked string as a modal sum
5.4.2 Waves on a string: d’Alembert’s solution
5.4.3 Natural frequencies of a stiff string
5.4.4 Energy loss in a string: internal damping
5.4.5 Energy loss in a string: air damping
5.4.6 Frequency responses for string synthesis
5.5 An extreme case: the banjo
5.5.1 The “square banjo” model
5.5.2 Housekeeping variables in the banjo synthesis models
5.5.3 Testing different bridges
Chapter 6 Underpinnings III: Hearing things
6.1 “It’s science, but not as we know it”
6.3 Loudness
6.4 Pitch, timbre and excitation patterns
Chapter 7 Variations for strings
7.1 The world of struck and plucked strings
7.2 Choosing strings
7.2.1 Selection chart algebra
7.2.2 The damping criterion for string selection
7.3 Multiple strings and double decays
7.3.1 Coupling of damped systems and the first-order method
7.4 Add a touch of nonlinearity…
7.4.1 Nonlinearity and longitudinal string motion
Chapter 8 Underpinnings IV: Nonlinearity
8.1 “It’s not a bug, it’s a feature”
8.2 Sources of nonlinearity: smooth and non-smooth
8.2.1 The simple pendulum
8.2.2 Duffing’s equation and harmonic balance
8.2.3 The friction damper
UNDER CONSTRUCTION…
8.3.1 Stability of equilibrium for the pendulum
8.3.2 Singular points and their phase portraits
8.4 Chaos!
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