Twenty Answers
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1.) C
2.) B, 20 micropascals is 0dB-SPL, which is the hearing threshold of the average human at roughly 3kHz. At other frequencies, the hearing threshold is affected by the loudness contour making it much higher at very low or very high frequencies.
3.) D
4.) C, The sensitivity states what voltage a microphone will produce with a certain sound pressure level input. A microphone with high sensitivity will give a high voltage output and will therefore not need as much amplification (gain) as a model with lower sensitivity.
5.) C and D
6.) B
7.) B, It drops 6 dB and so does the gain-before-feedback capability.
8.) D
9.) D, Using an omni against the floor or taped to a wall with the diaphragm within a 1/8-inch off the surface puts it in the pressure zone for most of the audio bandwidth.
10.) D
11.) C
12.) B
13.) D
14.) B, ORTF stands for Office de Radiodiffusion Television Francais.
15.) A
16.) True
17.) False, the PCC series are half-cardioids and half-super-cardioids.
18.) B, Positive pressure on the mic’s diaphragm will produce a positive voltage on pin 2.)
19.) D, It needs either phantom power from the mixer it’s plugged into or a battery.
20.) B