What are the three main types of microphones?
Moving Coil (Dynamic), Ribbon, and Condenser/Capacitor.
Microphones are ______ transducers. What are the two transductions?
Microphones are double transducers.
Moving Coil mics are what two types of mics?
Dynamic and Ribbon.
What does corrugated mean?
Ridges, Ruffles, Folds.
What did Emile Burliner do?
Invented mics and speakers.
What theory does condenser/capacitor mics work off of?
Condenser/Capacitor mics work off of the theory of capacitance.
What do tubes do?
They amplify an electrical signal.
What are modern tube condensers of today?
Transistors (Still an electrical amplifier).
Diaphragms are sprayed with _ _______ of ____?
Diaphragms are sprayed with 3 microns of gold.
What is a Discrete Circuit?
A chip.
48V is a power circuit.
If 100dB was given and it heard 100dB, it’ll be at ___dB?
If 90dB was given and it heard 80dB, it’ll be at __dB
If 100dB was given and it heard 100dB, it’ll be at 0dB.
If 90dB was given and it heard 80dB, it’ll be at -10dB.
What are the three basic pickup patterns?
Unidirectional (in front, one direction, cardioid, super, hyper).
Omnidirectional (all directions).
Bidirectional (Figure 8).
How does the sound picked up from behind a super or hyper cardioid sound?
Very dull.
What does the frequency response curve show?
It shows linearity, efficiency & deficiency (more/less than), range of frequencies, and hyper sensitivity.
What mic has the thinnest diaphragm?
Condenser mics have the thinnest diaphragm.
What is transient response?
How quickly a mic’s diaphragm responds to a sound wave.
List mics with the fastest, to mid, then to lowest transient response.
Condenser (Fastest), Ribbon (Mid), and Moving Coil (slowest).
The thinner the diaphragm, the ______ it reacts. Why?
The thinner the diaphragm, the quicker it reacts because there’s less mass to move. More mass = less detail.
What does UBM stand for?
Uni, Bi, oMni.
What are the effects of a moving coil and ribbon mic on an edgy voice?
Moving Coil (Good), Ribbon (Eh, it’d roll off too much).
Ribbon mics are good for what?
Go against something harsh and edgy, make it warm and mellow, good for ’30’s, ’40’s radio sound, bidirectional.
What is sensitivity rating?
Measurement of output level that a mic will produce in voltage (voltage measurement).
List the voltage measurement from the highest to lowest for the three main types of mics.
Condenser (Hottest), Moving Coil (Mid), Ribbon (Lowest).
Explain equivalent noise rating.
All mics make noise.
What is rumble?
How do you reduce rumble?
Low frequency vibrations that bleeds into the mic from the floor.

Bass Rolloff / Hi Pass Filter, shock mount, and floating floors get rid of rumble.

Explain proximity effect.
How do you remedy proximity effect?
When a cardioid mic is too close to a sound source, the bass takes over the mids and trebles.

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Bass Rolloff, change pickup pattern from cardioid to omni, or moving the mic back remedy proximity effect.

What are plosives?
How does one get rid of plosives?
Popping of P’s & B’s.

Pop Filters reduce plosives.

What is sibilance?
How does one get rid of sibilance?
S’s, Ch’s, and Z’s.

DeEsser (plugin), a pop filters, and a low pass filter reduce sibilance.

What is overload distortion?
When the DBSPL is too much for the mic to handle (then use pad).
What is impedance?
Resistance on an electrical circuit (match ohms of mic and preamp).
Explain the difference between a balanced line and an unbalanced line.
Balanced Line – 3 wires carry an audio signal, hot (+), cold (-), and ground (they’re quieter and can travel longer).

Unbalanced Line – 2 wires carry an audio signal, hot (+), and cold (-).

What does a preamp do?
Boosts a weak mic signal to a line signal.
What are the two basic mic placing techniques?
Close and Distant.