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32 Cards in this Set

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