Some facts on mirophones!

Tips for Independent Artist!!! Ribbon microphones use a thin metal ribbon suspended in a magnetic field. The ribbon is electrically connected to the microphone's output, and its vibration within the magnetic field makes the electrical signal. Ribbon microphones are similar to moving coil microphones, both produce sound from magnetic induction. Basic ribbon microphones detect sound in a bi-directional pattern because the ribbon, which is open to sound both front and back, responds to the pressure rather than the sound pressure. The front and rear pickup can be a problem in normal stereo recording, the high side rejection can be used to by positioning a ribbon microphone horizontally, Other directional patterns are produced by enclosing one side of the ribbon in an acoustic treated room, allowing sound to reach only one side. Protective wind screens can reduce the danger of damaging a vintage ribbon and also reduce plosive sounds in the recording. Most are designed with wind screens to unwanted attenuation. Like other dynamic microphone, ribbon microphones don't need phantom power, the voltage can damage some older ribbon microphones. Some new modern ribbon microphone designs have a preamplifier and do require phantom power. Also there are new ribbon materials available that are immune to wind blasts and phantom power. Dynamic microphones work by electromagnetic induction. They are robust, inexpensive and resistant to moisture. This, coupled with high gain before feedback, makes them good for on stage use. Moving-coil microphones use the same dynamic principle as in a loudspeaker, only reversed. A small movable induction coil, positioned in the magnetic field of a permanent magnet, is attached to the diaphragm. When sound enters through the windscreen of the microphone, the sound wave moves the diaphragm. When the diaphragm vibrates the coil moves in the magnetic field producing a varying current in the coil through electromagnetic induction. A single dynamic membrane does not respond linearly to all audio frequencies. Some microphones have multiple membranes for the different parts of the audio spectrum and then combine the resulting signals. Combining the multiple signals correctly is difficult and designs that do this are rare and tend to be expensive. There are on the other hand several designs that are more specifically aimed towards isolated parts of the audio spectrum. The AKG D 112, for example, is designed for bass response rather than treble. In audio engineering several kinds of microphones are often used at the same time to get the best result.