Audio Engineering

102 Chapter 3 shortcomings and require a very carefully designed sound system in order to allow the normally spoken word to be u ...

Acoustic Environment 103 The refl ected energy is 1 a. Table 3.4 gives typical absorption coeffi cients for common materials. T ...

104 Chapter 3 Table 3.4 : Continued Materials Coeffi cient 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Fiberboards, ½-in. normal soft ...

Acoustic Environment 105 Table 3.4 : Continued Materials Coeffi cient 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Masonite, 1/2 in., ...

106 Chapter 3 Table 3.4 : Continued Materials Coeffi cient 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Rockwool blanket, 2-in.-thick ...

Acoustic Environment 107 Table 3.4 : Continued Materials Coeffi cient 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Transite, 3/16-in. ...

108 Chapter 3 Table 3.5 : Absorption of Seats and Audiencea Materials 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 4 kHz Audience, seated, d ...

Acoustic Environment 109 sound underwent approximately 108 refl ections in this sample space before becoming inaudible. The resu ...

110 Chapter 3 the sound. This kind of diagram is called a refl ection pattern. The initial-signal-delay gap can be measured from ...

Acoustic Environment 111 Source 1 2 2 22 3 3 3 3 3 3 1 Direct field 2 Early field 3 Reverberant field Figure 3.16 : Comparison o ...

112 Chapter 3 source continues to put energy into the room at a reasonably regular rate. This gives rise to a number of basic so ...

Acoustic Environment 113 Further Reading........................................................................................ ...

This page intended left blank ...

Audio Electronics PART 2 ...

This page intended left blank ...

Components Andrew Singmin 4.1 Building Block Components ........................................................................ ...

118 Chapter 4 with the voltage source. Where else do we fi nd the innocent resistor lurking? Operational amplifi ers, or op-amps ...

Components 119 a simple voltage source (e.g., a 9-volt battery). The resistor midpoint is half the source voltage, that is, 4.5 ...

120 Chapter 4 Often people will make up their own jingle to remember the color codes—you know, something that has meaning for yo ...

Components 121 example given earlier, 0.9 kohm is less then 1 kohm (the smaller). For more than two resistors connected in paral ...