X CONTENTS 



Chapter Page 



5.5 Inertance 79 



5.6 Acoustic Capacitance 79 



5.7 Resistive and Reactive Load Upon a Vibrating Piston 80 



5.8 Resistive and Reactive Load Upon a Pulsating Sphere _. ... 81 



5.9 Resistive and Reactive Air Load Upon an Oscillating Sphere 83 



5.10 Impedance of a Circular Orifice in a Wall of Infinitesimal Thick- 

 ness 84 



5.11 Impedance of an Open Pipe With Large Flanges 84 



5.12 Closed Pipe With a Flange 84 



5.13 Horns 85 



5.14 Fundamental Horn Equation 86 



5.15 Infinite Parabolic Horn 87 



5.16 Infinite Conical Horn 88 



5.17 Infinite Exponential Horn 89 



5.18 Throat Impedance Characteristics of Infinite Parabolic, Conical 



and Exponential Horns 89 



5.19 Finite Conical Horns 90 



5.20 Finite Exponential Horns 91 



5.21 Throat Impedance Characteristics of Finite Exponential Horns.. . 92 



5.22 Exponential Connectors 94 



5.23 A Horn Consisting of Manifold Exponential Sections 96 



5.24 Sound Transmission in Tubes 97 



5.25 Transmission of Sound from One Medium to Another Medium 98 



5.26 Tubes Lined With Absorbing Material 100 



VI. DRIVING SYSTEMS 



6.1 Introduction 101 



6.2 Electrodynamic Driving System 101 



6.3 Electromagnetic Driving System 102 



A. Reed Armature Type 103 



B. Balanced Armature Type 105 



6.4 Condenser Driving System 107 



6.5 Piezoelectric Driving System 109 



Vll. DIRECT RADIATOR LOUD SPEAKERS 



7.1 Introduction Ill 



7.2 Single Coil, Single Cone Loud Speaker 112 



7.3 Multiple Single Cone, Single Coil Loud Speaker 119 



7.4 Single Coil, Double Cone Loud Speaker 120 



7.5 Double Coil, Single Cone Loud Speaker 121 



7.6 Double Coil, Double Cone Loud Speaker 123 



7.7 Mechanical Networks for Controlling the High Frequency Re- 

 sponse OF A Loud Speaker 124 



A. Conventional Single Coil Loud Speaker 125 



B. Loud Speaker with a Compliance Shunting the Cone Impedance . 125 



