admin 20 Dec 2017 0 Comments diaphragm the “heart” of the microphone It vibrates to corresponding changes in air pressure Frequency determined by how fast the conductor moves in and out of the magnetic field Amplitude determined by the strength of the magnet and the Hire a custom writer who has experience. It's time for you to submit amazing papers! order now amount of movement by the conductor Dynamic Microphones Moving Coil Ribbon Microphones transducers which changes acoustical energy into electrical impulses electrical signal produced by moving a conductor within a magnetic field moving coil The diaphragm is usually made of mylar Thickness is approximately 0.35 mils Attached to the diaphragm is the voice coil which is suspended to a high flux magnetic field Resistive damping used to achieve a flat frequency response The diaphragm has a resonance in the middle frequencies Ribbon microphone ribbon uses the electromagnetic theory of induction ? A thin corrugated sheet of metal, usually aluminum, suspended in a magnetic field Condenser Microphone works on an electrostatic principle capacitor is capable of storing a charge determined by: The composition and surface areas of the plates The dielectric or substance between the plates, air The distance between the plates (variable with changing air pressure) electrostatic principle Depends on variations in internal capacitance tube power supply Tube type condensers require a special cable between the mic and power supply The cable contains extra conductors which carry the voltage separate from the audio Phantom Power The audio and DC supply voltage travel in the same conductors (48 Vdc) Usually available on the console The mic will draw the required power while dynamic mics will ignore the power center tapped transformer A transformer at the console input will not pass DC voltage therefore the only path to travel is to the microphone Another transformer at the microphone routes the voltage in the appropriate direction The return of the DC voltage is down the shield to the negative side of the supply The polarizing charge is stored permanently within the diaphragm or back plate No form of powering is required to charge the diaphragm The pre-amp will still require power A well designed capsule will retain its charge for at least 10 years It is predicted it would take 30 to 100 years for the capsule sensitivity to drop 3 dB Related posts: Intro to Recording Greenberg Notes 4 AE2 DI box, transformer, bass recording Introduction To Media Arts – Full Sail University ASP microphone theory AE2 Misc Review of Hustle and Flow Intro to Recording