Microphones Flashcards
AKG C414B - ULS
Type: Condenser 48V: Yes Polar response: Variable (4) Applications: Vocals, piano, percussion. Character: Full-bodied. Features: Pads + HPFs
AKG C451B
Type: Condenser 48V: Yes Polar response: Cardioid Applications: Acoustic guitar, snare, hi-hats, overheads. Character: High-end rise. Features: Pads + HPFs
AKG D112
Type: Dynamic 48V: No Polar response: Cardioid Applications: Kick, bass cabinet, trombone, double bass, cello Character: 4K presence rise. Features: None.
Audio Technical AE3000
Type: Condenser 48V: Yes Polar response: Cardioid Applications: Guitar cabinet, toms, snare, timpani, overheads, horns. Character: Open Features: Pad + HPF.
Audio Technica AT4031
Type: Condenser 48V: Yes Polar response: Cardioid Applications: Snare, overheads, acoustic guitar, piano, horns. Character: Slight high-end rise. Features: HPF.
Audio Technica AT4050
Type: Condenser 48V: Yes Polar response: Variable (3) Applications: Vocals, piano, strings, overheads, guitar cabinet. Character: Well balanced. Features: Pad + HPF.
The dB is used when measuring mics because:
It’s the standard for acoustic pressure measurements in audio.
20 micropascals is:
0dB-SPL, which is the hearing threshold of the average human at roughly 3kHz.
What is sensitivity?
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.
What happens if you connect a speaker to a mic input on a mixer?
The speaker works like a big microphone.
What is the Proximity Effect?
Is an increase in LF response when a cardioid mic is close to an acoustic source.
When a mic that is 3 inches in front of a singer is moved to 6 inches, the level will:
Drop 6 dB and so does the gain-before-feedback capability.
The tightest cardioid pick-up pattern is:
Hyper-cardioid.
An omni mic placed a few millimeters away from a reflective surface creates an effect identical to a:
PZM or Boundary mic. 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.
Shure introduced the 3B and 10B Carbon microphones in:
1936.
The Sennheiser MD421 was introduced in:
1960.
What stereo micing technique uses a coincident pair of two bi-directional microphones in the same point, angled at 90° to each other?
Blumlein stereo.
What stereo micing technique uses two cardioid mics with the capsules spaced 17cm apart, with the two mics at a 110° angle creating the stereo image?
ORTF (Office de Radiodiffusion Television Francais).
What stereo micing technique uses a cardioid microphone capsule as center channel and a bi-directional figure-eight-mic at the same point, angled at 90°, which is then brought in on faders, out-of-phase to create the stereo image?
M-S.
Does a PZM receive direct and reflected sound simultaneously?
Yes.
Is the Crown PCC an omnidirectional microphone?
No. The PCC series are half-cardioids and half-super-cardioids.
If wired according to the AES standard, pin 2 of a microphone’s XLR connector will:
Always be “hot”, “live” or positive. Positive pressure on the mic’s diaphragm will produce a positive voltage on pin 2.
Does an electret microphone require a power supply?
Yes. It needs either phantom power from the mixer it’s plugged into or a battery.
Which microphone naturally has a figure eight or bi-directional pick-up pattern?
Ribbon.
