Audio and Hi-Fi Engineer's Pocket Book (eBook)

Front Cover 1
Audio and Hi-Fi Engineer's Pocket Book 4
Copyright Page 5
Table of Contents 6
Preface 8
Chapter 1. Sound and acoustics 9
Human hearing 9
Sound sources 13
Measuring sound 17
Sound propagation 21
Room and hall acoustics 30
Sound insulation 34
Chapter 2. Microphones 39
Transducers 39
Acoustic characteristics 43
Special types of microphone 45
Microphones in the sound field 47
Microphone electrical parameters 49
Chapter 3. The gramophone Studio techniques 53
The record groove 55
Disc manufacture 56
Reproducing styli 57
Stylus tracking 59
Pickup cartridges 61
Cartridge parameters 62
Pickup arms 63
Turntables 65
Turntable parameters 66
Chapter 4. Compact discs 67
Principles 67
Compact disc format 71
The CD player 74
Three-beam system 74
Single-beam systems 77
Decoding the signal 79
Compact disc manufacture 82
Chapter 5. Tape recording 83
Magnetism 83
Magnetic recording 85
Bias 86
Record/playback heads 89
Noise reduction 91
Head circuits 95
Head materials 97
Erasing 98
Effect of oxide deposits 99
Head adjustments/maintenance 99
Tape transport 101
Motors and speed control 103
Hi-fi sound with video 105
Digital tape recording 106
Recording tape 107
Tape manufacture 109
Musicassette manufacture 110
Tape parameters 111
Tape groups 112
Open-reel recorders 113
The compact cassette 113
Chapter 6. High-quality radio Receiver principles 115
Stereo broadcasting 118
Stereo decoding 119
BBC stereo test transmissions 120
Interference 121
Alignment 122
f.m. tuner parameters 123
f.m. aerials 125
Chapter 7. Amplifiers 127
Thermionic valves 127
Audio transistors 129
Transistor characteristics 131
Basic transistor circuit features 132
Amplifier parameters 141
Chapter 8. Loudspeakers 143
The driver 143
Enclosures 148
Baffle/doublet 148
Infinite baffle 149
Reflex enclosure 150
The horn 151
Labyrinth/transmission line 152
Column/line source 153
Loudspeaker absorbents 154
Electrostatic speakers 155
Unconventional speakers 157
Crossover networks 159
Chapter 9. Public address 161
Objectives 161
Loudspeaker distribution 162
Avoiding feedback 163
Delay lines 165
Use of delay lines 166
Ceiling speaker mounting 167
Mixers 168
Induction loops 169
P.a. system problems 171
Chapter 10. Facts and formulae 173
Resistance and impedance 173
Q-factor 174
Attenuators and matching pads 175
Filters 177
Test equipment 179
Oscilloscope traces 181
Power circuits 183
Index 186