More on Microphones
by Michael Williams,
(
www.williamsmmad.com
)
CONTENTS
Preface
1 Introduction
2 Microphone Design Electroacoustics
3 Sound Wave Propagation
4 Acoustic Coupling
4.1 Pressure Acoustic Coupling
4.2 Pressure Gradient Acoustic Coupling
5 Electomagnetic and Electrostatic Transducers
5.1 The Electromagnetic Transducer
5.2 The Electrodynamic_Ribbon_Transducer
5.3 The Electrostatic Transducer
6 Control by Mass, Resistance or Compliance
7 Diaphragm Movement and Signal Generation
8 Measurement and Operational Characteristics
8.1 Frequency Response
8.1.1 The Electrodynamic Moving Coil Microphone
8.1.2 The Electrodynamic Ribbon Microphone
8.1.3 The Electrostatic Microphone
8.2 Directivity
8.2.1 Omnidirectional Directivity Response
8.2.2 Bi-directional or Figure of Eight Directivity
8.2.3 Uni-directional: Hypocardioid, Cardioid, Supercardioid and Hypercardioid Directivities
8.2.4 The Mathematical Model for Directivity
8.2.5 Directivity versus Frequency Response
8.2.6 The Graphical Representation of Directivity
8.2.7 Ratio of Direct to Reverberant Sound
8.2.8 Highly Directional Microphones Systems
The Rifle Mic
The Parabola
8.3 The Proximity Effect
8.4 Wind Noise Protection
8.5 Antiplosive Protection
8.6 Microphone Mounting and Suspension Systems
9 The Interpretation of Microphone Data Sheets
9.1 Sensitivity
9.2 Maximum SPL
9.3 Wind Noise
9.4 A Worked Example
9.5 A Blank Form