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Lecture

IAT 202 Lecture Notes - Electric Charge, Reverberation, Xlr Connector


Department
Interactive Arts & Tech
Course Code
IAT 202
Professor
Susan Clements- Vivian

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Microphones: 2 types
Dynamic:
Good for loud sounds
Durable
Not as sensitive, can't pick up a lot of detail without cranking gain
Don't need power (external)
Have diaphragm, have magnetic rod, have coil
Takes energy (lots of air pressure) to push diaphragm back, so not as sensitive
Headphones are
Used quite often on stage to avoid feedback
Condenser:
Really super thin diaphragms on either end
Electric charge held in middle
Slightest air pressure movement causes change in electrical charge
Need external power at all times (phantom power, 48V/9V)
Field recorders can give this to these mics
Can be easily damaged
Built into field recorders
Super sensitive, accept a lot of detail
More frequently used
Other types, but we don't have access to them
Polar/pick up pattern:
How they pick up sounds
Omnidirectional:
Picks up sound from all directions
Good for room tone, crowd noise (called Walla), just general ambience
Bidirectional or figure 8:
Can pick up sound from front and back
Rejects sound from sides
Pattern looks like figure 8
Good for conversation between two people, recording harmonies of
background signers
We don't have access to any. :(
Can accomplish with field recorders (two mics)
Cardioid:
Most common
"Heart" - think graphs!
Picks up sound mainly from the front
Rejects sound from the back, somewhat from the sides
Point source
Good for individual sounds
Also have super cardioid or hyper cardioid
Even more focused, really pick up from front and reject from
behind
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