Mics Flashcards
Omni
Most natural sounding
Figure 8
Cardioid
Hypercardioid
Least natural
How to help reject sound from other sources
3:1 rule
Dynamic mics
To avoid phase cancellation
Ribbon mics
Actual ribbon inside with a thin coat of metal on it
Ribbons vibrate linearly
Magnetic field (powered by phantom) created by currents between two plates
The ribbon moving inside is what creates the signal, changing the electromagnetic field
Condenser mics
Pick up vibrations in the diaphragm, creating a current in the metal plate - similar to the inside of a DI. The plate is called a capacitor.
Phantom power is required to operate condenser microphones because they have an active circuit. The membrane can only transport the sound through the external voltage
Phase inverted mics
Contact mics- cardioid
Do Dynamic Mics need phantom power?
Dynamic mic does not need a magnetic field, where a condenser mic does
so dynamic mics do not need phantom power
Proximity effect
The proximity effect in audio is an increase in bass or low frequency response when a sound source is close to a directional or cardioid microphone.