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Review #7 (Microphone)
14. Dynamic Mic | Condenser Mic | Ribbon Mic?
*Instruments are each would be best used by: 1) Dynamic Mic —> Kick drum 2) Condenser Mic —> Vocal, Piano 3) Ribbon Mic —> Vocal, Acoustic instruments (Guitar, etc.)
1) Dynamic Mic - Common in use in stage use, where physical strength is very important - Also, this is reasonably insensitive to environmental factors, so can be used in extensive use and outdoor use - Since moving-coil technology is fairly refined and capable of very good sonic characteristics, dynamic microphones are also widely used in recording studio - Rapidly fall off above 10 kHz and gradually fall off below 100 Hz
- Since the diaphragm of a condenser Mic is not loaded down with the mass of coil, it can respond very quickly and accurately to an incident sound - Thus, this has generally excellent sonic characteristics, so are used widely in recording studios (for recording) - Being sensitive to physical shocks and environmental factors (humidity), so it is less used in sound reinforcement - Slightly bright/brittle, peak: 8k ~ 10 kHz
3) Ribbon Mic - Usually have excellent sonic characteristics with great warmth and gentle high frequency response - They also have excellent transient response and very low self-noise - So, vocal and acoustic instruments are good for use - Warm, peak: presence and 200 Hz (low freq.)
15. What is 'Off-axis rejection'? (see the Top picture) - In cardioid Mic, : Signals arriving at the front (0°, on-axis) of the diaphragm will produce a full output level : Signals arriving at the rear of the diaphragm (180°, off-axis) will cancel each other out, resulting in a greatly reduced output
[side trip] - Mic shape is Not a trade mark (™). The shape of microphone, like airplane wings, is a structure in common sense. - Neumann U87: Studio reference microphone in general.
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