Handbook for Sound Engineers

1232 Chapter 33 Amplifier power ratings are based on signals that can bear little resemblance to audio program material. Monito ...

1233 Chapter 34 Sound System Design by Chris Foreman 34.1 Introduction.......................................................... ...

1234 34.2.3.4.6 The Effect of Directional Microphones and Loudspeakers.................................. 1253 34.2.3.5 Validity ...

1235 34.3.3.3 Multicluster System.............................................................. 1270 34.3.3.4 Distributed Column ...

1236 34.4.4.2.3 Constant Q versus Variable Q Equalizers............................................... 1287 34.4.4.3 Parametric ...

1237 34.5.1.9.2 Improperly Wired ac Receptacles..................................................... 1302 34.5.1.9.3 Two-Wire ac ...

1238 34.6.1.4 Cabling....................................................................... 1318 34.6.1.5 Electronics.......... ...

Sound System Design 1239 34.1 Introduction There are a multitude of different types of sound sys- tems with purposes as diverse ...

1240 Chapter 34 34.2.2.1 Definitions It is conventional to use the terms Ds, D 1 , D 2 , and D 0 when referring to the distances ...

Sound System Design 1241 again. The difference between the two readings is the acoustic gain of the system. (Replace the talker ...

1242 Chapter 34 In a high-noise system, a 10 dB head room factor may not be achievable. By using a limiter, the head room factor ...

Sound System Design 1243 Here, the term Ds is the (reference) distance at which the LP from the talker was measured. The term Ds ...

1244 Chapter 34 may be obtained by using a directional microphone (i.e., a cardioid pattern microphone) and/or by using a direc- ...

Sound System Design 1245 four questions are important enough that, in the next section, they form the basis for an expansion of ...

1246 Chapter 34 also, as explained previously, improve the ability to understand speech by effectively making it louder. 34.2.3. ...

Sound System Design 1247 Q compares the on-axis sound intensity of a single loudspeaker to what that intensity would be if the l ...

1248 Chapter 34 ical distance depends on the Q of the source and the absorption in the room; thus, it can vary with frequency, a ...

Sound System Design 1249 (34-15) where, and where, x is any distance. Example: Let, LP = 90 dB, D = 4 ft, Dc = 125 ft, Q = 5, S ...

1250 Chapter 34 . The value LP in the first line of the equation is the desired LP at D 2. The value H is a desired value for he ...

Sound System Design 1251 most accurate in rooms with reverberation times of 1.6 s or longer and is not particularly accurate or ...