123834.6.1.4 Cabling....................................................................... 1318
34.6.1.5 Electronics..................................................................... 1319
34.6.1.6 Multichannel Portable Systems..................................................... 1319
34.6.1.7 Electrical and SPL Safety in Portable Systems......................................... 1319
34.6.1.8 Performance Criteria............................................................. 1319
34.6.1.9 Stage Monitor Systems........................................................... 1320
34.6.1.10 The Entertainment System as a Musical Instrument.................................... 1320
34.6.2 Systems for Religious Facilities........................................................ 1320
34.6.2.1 User Interface.................................................................. 1321
34.6.2.2 Systems for Inexperienced Operators................................................ 1321
34.6.2.3 System Aesthetics............................................................... 1321
34.6.2.4 Reverberant Room Problem....................................................... 1322
34.6.3 Sports Stadiums and Other Outdoor Systems.............................................. 1322
34.6.3.1 Excess Attenuation of High Frequencies in Air........................................ 1322
34.6.3.2 Using Distributed Systems Outdoors................................................ 1323
34.6.3.3 Echoes Outdoors, Artificial and Otherwise........................................... 1323
34.6.3.4 Dealing with Long Distances...................................................... 1324
34.6.3.5 High Noise Outdoors (or Indoors).................................................. 1325
34.6.3.6 Dealing with Varying Noise Levels................................................. 1325
34.6.3.7 Thermal Layers of Air............................................................ 1326
34.6.3.8 The Effect of Wind.............................................................. 1326
34.6.3.9 Dealing with Weather-Caused Deterioration.......................................... 1327
34.6.3.10 Simulating the Indoor Environment Outdoors........................................ 1327
34.6.4 Artificial Ambience................................................................. 1328
34.6.5 Conference and Boardroom Systems.................................................... 1328
34.6.5.1 Local Sound Reinforcement in a Conference Room..................................... 1328
34.6.5.2 Recording a Conference.......................................................... 1329
34.6.5.3 Audio and Video Teleconferencing................................................. 1329
34.6.6 Sound Masking (Noise Masking), Speech Privacy Systems.................................. 1330
34.6.6.1 Criteria for the Environment....................................................... 1330
34.6.6.2 Mechanical Noise Reduction...................................................... 1330
34.6.6.3 Masking Sound................................................................. 1330
34.6.6.4 Criteria for the Loudspeaker System................................................. 1330
34.6.6.5 Criteria for the Amplification System................................................ 1331
34.6.6.6 Criteria for the Equalizer.......................................................... 1331
34.6.6.7 A Second System............................................................... 1331
34.6.6.8 Masking Plus Paging or Background Music........................................... 1331
34.6.6.9 Adjusting the Installed System..................................................... 1332
34.6.6.10 Objective and Subjective Methods for Measuring System Effectiveness................... 1332
34.6.6.11 Conclusion.................................................................... 1333
34.7 Computers and Software for Sound Reinforcement Systems..................................... 1333
34.7.1 Digital Audio Devices................................................................ 1333
34.7.2 Audio Signal Transmission via Computer Networks........................................ 1333
34.7.3 System Control and Monitoring by Computer............................................. 1333
34.7.4 Computer Aided System Design........................................................ 1333
34.7.5 Computer Aided Measurement Systems.................................................. 1334
References................................................................................ 1334
Organizations and Web Sites.................................................................. 1335
Bibliography.............................................................................. 1335