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Army Communication Systems Audio Production PrinciplesAudio Production PrinciplesGeneralThe objectives for this subcourse support STP tasksTable of ContentsTable of Contents (Cont)Introduction to Audio Production PrinciplesLesson 1. Define theory of soundFigure 1-2. CompressionFigure 1-5. Rarefactions and compressions combine into a "sound wave"Figure 1-8. Sine wavesFigure 1-9. WavelengthLearning Event 3: Describe Factors Affecting Sound QualityFigure 1-12. Reflection of sound waveFigure 1-13. Absorption of a sound waveFigure 1-15. Sound traveling from air, to glass, to airFigure 1-16. Diffraction of lower frequenciesFigure 1-17. Sound waves partially "out of phase"Figure 1-18. Sound wave 180 "out of phase"Learning Event 4: Use Sound MeasurementPercentage of ModulationPractice ExerciseAnswers to Practice ExerciseLesson 2. Operate audio consoles and microphonesBalanceLearning Event 2: Use Audio ConsoleControlsGates Diplomat Audio ConsoleLearning Event 3: Describe Microphone CharacteristicsPrimary Microphone Characteristics.Figure 2-22. Bidirectional pickup patternFigure 2-24. Unidirectional pickup patternFigure 2-25. Carbon microphoneFigure 2-26. Bimorph microphoneFigure 2-27. Dynamic microphoneFigure 2-28. Velocity (ribbon) microphoneFigure 2-29. Capacitor (condensor) microphoneSpecial Purpose Microphones.Shotgun MicrophonesElectret Condenser Microphone (Lavalier).Figure 2-30. Patch panelSafety Precautions and Practices.Practice ExerciseAnswers to Practice ExerciseLesson 3. Operate turntables and audiotape recorder/reproducers.Turntable ControlsOperator's maintenance of a turntableLearning Event 2: Identify Parts of Audiotape Recorder/ReproducerFigure 3-31. Tape transportFigure 3-32. Basic operation of recording or reproducing headFigure 3-33. Bias current applied to audio signalFigure 3-34. Reproduce head gap showing an audio signal and bias current combined on the tapeLearning Event 3: Operate Reel-to-Reel RecorderOperator's maintenance of reel-to-reel recorder/reproducerLearning Event 4: Operate Audiotape Cartridge and Cassette UnitsAll professional recorder/reproducer units have five controls that regulate tape motion.Operator's maintenance of audiotape cartridge and cassette unitsPractice ExercisePractice Exercise (cont)Answers to Practice ExerciseLesson 4. Edit, splice, and duplicate audiotapeFrequency response.Learning Event 2: Edit and Splice FormatsEditing connected speech.Word inflection problems.Learning Event 3: Use the Limits of Hearing in EditingPersistence of hearingEffects of editing too closely.Figure 4-35. The EdiTall tape editorSplicing material.Figure 4-36. Examples of how NOT to splice tapeElectronic editing.Learning Event 5: Store and Handle Records and TapeLearning Event 5: Store and Handle Records and Tape (Cont)Practice ExercisePractice Exercise (Cont)Answers to Practice ExerciseBlank page
Army Communication Systems
Audio Production PrinciplesAudio Production PrinciplesGeneralThe objectives for this subcourse support STP tasksTable of ContentsTable of Contents (Cont)Introduction to Audio Production PrinciplesLesson 1. Define theory of soundFigure 1-2. CompressionFigure 1-5. Rarefactions and compressions combine into a "sound wave"Figure 1-8. Sine wavesFigure 1-9. WavelengthLearning Event 3: Describe Factors Affecting Sound QualityFigure 1-12. Reflection of sound waveFigure 1-13. Absorption of a sound waveFigure 1-15. Sound traveling from air, to glass, to airFigure 1-16. Diffraction of lower frequenciesFigure 1-17. Sound waves partially "out of phase"Figure 1-18. Sound wave 180 "out of phase"Learning Event 4: Use Sound MeasurementPercentage of ModulationPractice ExerciseAnswers to Practice ExerciseLesson 2. Operate audio consoles and microphonesBalanceLearning Event 2: Use Audio ConsoleControlsGates Diplomat Audio ConsoleLearning Event 3: Describe Microphone CharacteristicsPrimary Microphone Characteristics.Figure 2-22. Bidirectional pickup patternFigure 2-24. Unidirectional pickup patternFigure 2-25. Carbon microphoneFigure 2-26. Bimorph microphoneFigure 2-27. Dynamic microphoneFigure 2-28. Velocity (ribbon) microphoneFigure 2-29. Capacitor (condensor) microphoneSpecial Purpose Microphones.Shotgun MicrophonesElectret Condenser Microphone (Lavalier).Figure 2-30. Patch panelSafety Precautions and Practices.Practice ExerciseAnswers to Practice ExerciseLesson 3. Operate turntables and audiotape recorder/reproducers.Turntable ControlsOperator's maintenance of a turntableLearning Event 2: Identify Parts of Audiotape Recorder/ReproducerFigure 3-31. Tape transportFigure 3-32. Basic operation of recording or reproducing headFigure 3-33. Bias current applied to audio signalFigure 3-34. Reproduce head gap showing an audio signal and bias current combined on the tapeLearning Event 3: Operate Reel-to-Reel RecorderOperator's maintenance of reel-to-reel recorder/reproducerLearning Event 4: Operate Audiotape Cartridge and Cassette UnitsAll professional recorder/reproducer units have five controls that regulate tape motion.Operator's maintenance of audiotape cartridge and cassette unitsPractice ExercisePractice Exercise (cont)Answers to Practice ExerciseLesson 4. Edit, splice, and duplicate audiotapeFrequency response.Learning Event 2: Edit and Splice FormatsEditing connected speech.Word inflection problems.Learning Event 3: Use the Limits of Hearing in EditingPersistence of hearingEffects of editing too closely.Figure 4-35. The EdiTall tape editorSplicing material.Figure 4-36. Examples of how NOT to splice tapeElectronic editing.Learning Event 5: Store and Handle Records and TapeLearning Event 5: Store and Handle Records and Tape (Cont)Practice ExercisePractice Exercise (Cont)Answers to Practice ExerciseBlank page
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