Handbook for Sound Engineers

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Microphones 493 16.1 Introduction All sound sources have different characteristics; their waveform varies, their phase character ...

494 Chapter 16 16.2.1 Omnidirectional Microphones The omnidirectional, or spherical, polar response of the pressure microphones, ...

Microphones 495 smallest diaphragm possible versus the lowest signal-to-noise ratio, SNR, or put another way, the smaller the di ...

496 Chapter 16 phones because they discriminate between signal and random unwanted noise. This has many advantages including: L ...

Microphones 497 diaphragm it is some angle between 0° and 180°, as shown in Fig. 16-11B. If the rear pressure was at 0°, the out ...

498 Chapter 16 In both cases, force F 1 , the sound pressure on the front of each diaphragm, is the same. Force F 2 is the force ...

Microphones 499 microphone will seriously degrade the effective high-frequency discrimination. An example of such degradation ca ...

500 Chapter 16 One sound opening, which is exposed to the sound pressure p 1 , is represented by the front surface of the diaphr ...

Microphones 501 This configuration is used for three reasons. By using a multiple arrangement of entry holes around the circumfe ...

502 Chapter 16 diagram of the RE20. By moving the red wire to either the 250:or 50: tap, the microphone output imped- ance can ...

Microphones 503 The change in contact resistance causes the current from the power supply to vary in amplitude, resulting in a c ...

504 Chapter 16 provide room for its movement. The cementing flat is bonded to the face plate. A stiff hemispherical dome is desi ...

Microphones 505 this reduces the peak at 350 Hz, it does not fix the droop below 200 Hz. Additional acoustical resonant devices ...

506 Chapter 16 does illustrate that even with a “perfect,” massless, moving-coil microphone, “perfect” electrical wave- forms wi ...

Microphones 507 Unidirectional microphones are usually differential microphones; that is, the diaphragm responds to a pres- sure ...

508 Chapter 16 EO is the output in volts, Ep is the dc polarizing voltage in volts, a is the radius of active area of the diaphr ...

Microphones 509 source of polarizing voltage for the head, and a source of power. A high-quality capacitor microphone, the Sennh ...

510 Chapter 16 tive feedback circuit, or by reducing the polarizing voltage to one-third its normal value and by using a resisti ...

Microphones 511 networks are used across the input transformer primary. Connect a B+ supply of 9–12 V directly to the artificial ...