Table of Contents from the Age of Electronic Messages

Series Foreword xiii
Preface xv
 
1 The Technology of Communications 2
1.1 Social Changes 2
1.2 Political Effects 2
1.3 Transportation 3
1.4 Manufacturing 3
1.5 Service Industries 3
1.6 Entertainment 4
1.7 Factors in Decisions about a New Technology 4
1.8 Measuring Information--A Central Concept 5
1.9 The Plan of the Book 6
 
2 Messages without Errors 7
2.1 Redundancy in Language 8
2.2 Spelled Speech 9
2.3 Communicating Numbers 9
2.4 Digital Root 11
2.5 Casting Out Nines 13
2.6 Transmission with Error Correction 14
2.7 Hamming Code 16
2.8 Bar Codes 20
2.9 Universal Product Code 23
Appendix 2.1 Telephone Numbers 33
Review Questions 44
Problems 45
 
3 Electrical Safety 52
3.1 Basic Concepts of Electricity 52
3.2 Lightning 59
3.3 Home Electrical Energy 62
3.4 Shockfrom a Toaster 69
3.5 Electrical Effects on People 73
Appendix 3.1 Scientific Notation 82
Appendix 3.2 One Problem in Human Experimentation 83
Review Questions 85
Problems 87
 
4 The Building Blocks of Signals 94
4.1 Sine Signals 94
4.2 Concept of Frequency 99
4.3 Sound Signals 103
4.4 Human Communication 107
4.5 More Complex Signals 109
4.6 Uses of Spectrograms 113
4.7 Personal Verification 116
4.8 Sound Signals of All Types 121
4.9 Spectrum and Spectrogram 128
4.10 Many Signals through One System 133
4.11 Testing Automobile Engines 137
Review Questions 139
Problems 141
 
5 Resonance 145
5.1 Free Response 145
5.2 Forced or Driven Response 147
5.3 Systems with Multiple Resonances 154
5.4 Uses of Resonance 159
5.5 An Application of Resonance 163
5.6 Computer Speech 165
5.7 Problems of ASR 167
5.8 Generation of Human Speech 168
5.9 Example of ASR 172
Review Questions 173
Problems 174
 
6 The Engineer Looks at Hearing 181
6.1 The "Black Box" Approach to Hearing 183
6.2 Frequency Response of Human Hearing 185
6.3 Sensitivity of Human Hearing 188
6.4 Audiometry 193
6.5 Other "Black Box" Characteristics 194
6.6 The Stethoscope 201
6.7 Parts of the Ear 204
6.8 Outer Ear 206
6.9 Middle Ear 208
6.10 Inner Ear 210
Review Questions 213
Problems 214
 
7 Digital Signals 223
7.1 A Tactile Communication System 224
7.2 Morse Code 227
7.3 Sampling 228
7.4 Quantizing 235
7.5 Coding 236
7.6 Breaking the USPS Code 238
7.7 Limits of Human Communication 242
7.8 Digital Audio 244
Review Questions 251
Problems 252
 
8 Signals through Space 261
8.1 Light 262
8.2 Other Electromagnetic Signals 265
8.3 Biological Effects of High-Frequency Electromagnetic Signals 271
8.4 Biological Effects of Non-lonizing Radiation 271
8.5 Standards for Exposure 274
8.6 Project Sanguine-Seafarer-ELF 278
8.7 A Natural Resource Gone 287
Appendix 8.1 EMP (Electromagnetic Pulse) 291
Review Questions 295
Problems 296
 
9 Radio 305
9.1 Radio Signals 308
9.2 Frequencies for Radio 310
9.3 Modulation 313
9.4 Some Radio History 314
9.5 Amplitude Modulation, or AM 318
9.6 Geographical Coverage of a Radio Station 324
9.7 Speech Scramblers 327
9.8 Frequency Modulation, or FM 330
9.9 Radio Navigation 335
9.10 Radar 342
9.11 Radar Countermeasures 350
9.12 Police Radar 351
Review Questions 355
Problems 357
 
10 Medical Ultrasonic Imaging 367
10.1 Echolocation 368
10.2 Sonar for Submarine Detection 369
10.3 Echoes from the Body 371
10.4 Basic Equipment 375
10.5 Health Effects 380
10.6 Conclusion 383
Review Questions 383
Problems 384
 
11 Television 387
11.1 Telecommunication of a Picture 389
11.2 Structure of the Video or Picture Signal 390
11.3 Other Video Structures 399
11.4 History of Television 402
11.5 Chromaticity Diagram 406
11.6 Human Color Vision 408
11.7 Color Television 414
Appendix 11.1 Human Vision 418
Review Questions 436
Problems 438
 
12 Broadcasting and Narrowcasting 457
12.1 Video Signal 458
12.2 Broadcast Signal 461
12.3 TV Broadcasting 464
12.4 Digital Television 466
12.5 Unconventional TV Broadcasting 468
12.6 Cable TV 471
 
Review Questions 474
Problems 475
Index 483