Audio Engineering

662 Chapter 22 either constructive or destructive according to the degree of phase difference. When the interference is destruct ...

Microphone Technology 663 compared as to strength with the stronger signal at any instant being switched to the remainder of the ...

664 Chapter 22 Frequency Magnitude (dB) Transmitter pre-emphasis and receiver de-emphasis 20 15 10 5 102 103 104 0  5  10  15 ...

Microphone Technology 665 The microphone elements are fi tted with clips for attachment to the user’s clothing. Occasionally, th ...

666 Chapter 22 Figure 22.13 : A wireless microphone system. (Photo courtesy of Michael Pettersen of Shure, Inc.) One fi nal note ...

Microphone Technology 667 practice to employ balanced circuits for both input and output in those instances where the signal lev ...

668 Chapter 22 Shielded, twisted pairs in balanced circuits are an absolute necessity in handling low- level signals in order to ...

Microphone Technology 669 that with the induced voltage in the white conductor in the lower right in which the induced voltage i ...

670 Chapter 22 return circuit is through the shield on the microphone cable at pin 1. Conductors 2 and 3 have the same DC potent ...

Microphone Technology 671 of the center tap as well as exact resistance of the turns on either side of the center tap. If this i ...

672 Chapter 22 being possible. A slow leak for allowing the capsule’s rear chamber pressure to follow weather-induced atmospheri ...

Microphone Technology 673 wavelength, λ. When this occurs, the sound fi eld is disturbed by refl ection from the capsule’s diaph ...

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Loudspeakers Ian Sinclair The conversion from electronic signals to sound is the formidable task of the loudspeaker. In this cha ...

676 Chapter 23 The sensation of sound is caused by compressions and rarefactions of the air in the form of a longitudinal oscill ...

Loudspeakers 677 It is apparent that the intensity level IL will equal the sound pressure level SPL only if po C  400 Rayls. Fo ...

678 Chapter 23 phase of the pressures from these elementary elements. For r large compared with the radius of the pistona , the ...

Loudspeakers 679 23.6 Sound Pressure Produced at Distance r ................................................................ Low ...

680 Chapter 23 where Q P pd  x 4 2 2 2 π πφφφ ax ∫ 0 sin. (23.13) The mechanical impedance in MKS mechanical ohms (Newton-secon ...

Loudspeakers 681 Numerically, for Ka , l : R a c ohms Ma mR 0 m kg.   15 267 4 (^30) ./ . ρ ρ It will be seen that the reactiv ...