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32 Cards in this Set
- Front
- Back
Compression
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Air molecules moving closer together
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Rarefaction
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air molecules moving further apart
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waveform
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graphical representation of sound pressure over time
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amplitude
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volume; representation by height above or below center line
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frequency
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hertz; number of cycles per second
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velocity
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how fast sound travels
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wavelength
which is longer, higher or lower frequencies? |
pyshical length of wave from beginning to end of cycle
higher frequency = shorter |
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diffusion and absorption
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diffusion - scattered reflections caused by non-flat surfaces
absorption - soaking up of sound by a surface |
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spl
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sound pressure level, the higher the spl, the louder the sound. measured in db's
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transducer
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changes one form of energy into another
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fletcher munson
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humans can hear mid frequencies better than highs and lows
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masking
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loud signals prevents the ear from hearing the softer sounds
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____________ requires phantom power
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condenser
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omnidirectional
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picks up equally well in all directions
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directional
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picks up sound better from directions than other directions
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cardoid
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picks up sound in front; rejects in rear
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super cardoid
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better side rejection than cardoid
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bidirectional
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picks up sound equally well at front and rear
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shure sm57
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cardoid, snare drum, electrical guitar
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akg d112
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dynamic cardoid; bass drum, bass guitar
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senheiser md421
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dynamic cardoid; toms and horns
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akg 414
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large diaphragm condensor; capable of 4 seperate patterns, voice
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neumann u87
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large diaphragm condenser; omni, cardoid, bi; vocals, acoustic guitar
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proximity effect
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increase in bass response as a directional mic is moved with 1' of a sound source
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DI
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active di requires phantom power
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close micing
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mic positioned 1-3''s from source, reduces leakage
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ambient micing
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mic placed at a distance from the sound
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spaced pair
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mics spaced a few feet to more than 30'
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3:1 rule
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for every unit of distance between a mic and its source, a nearby mic should be at least 3 times that distance
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x/y
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two directional mics as close together without touching angled at 90degrees
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blumlein
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stereo micing technique
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m/s mid side
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cardoid mic facing source and bidirectional mic with null side facing source
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