What is a unidirectional microphone used for?
The most common unidirectional microphone is a cardioid microphone, so named because the sensitivity pattern is "heart-shaped", i.e. a cardioid. The cardioid family of microphones are commonly used as vocal or speech microphones, since they are good at rejecting sounds from other directions.
A boundary microphone is a small omnidirectional condenser mic capsule positioned near or flush with a boundary (surface). The arrangement provides a directional half-space pickup pattern while delivering a relatively phase-coherent output signal.
- A noise-canceling microphone is a microphone that is designed to filter ambient noise from the desired sound, which is especially useful in noisy environments.
- What does PZM stand for?
Rank Abbr. Meaning PZM Pressure Zone Microphone PZM Polski Zwiazek Motorowy (Poland) PZM Partnerstvo Za Mir (Slovenian: Partnership for Peace; NATO) PZM Pusat Zakat Melaka (Malaysian regulation)
- The term condenser is actually obsolete but has stuck as the name for this type of microphone, which uses a capacitor to convert acoustical energy into electrical energy. Condenser microphones require power from a battery or external source. The resulting audio signal is stronger signal than that from a dynamic.
There are a few great overall mics to have but there's a reason for the wide array – depends on the job.
- First a word on patterns. There are 4 main types of microphones: cardioid, super cardioid, omni and figure 8.
- Dynamic mics.
- Condenser mics.
- Ribbon mics.
- Polar patterns. An omnidirectional microphone will in principle pick up sound equally from all directions. The smaller the capsule, the more true omni the microphone is. Directional microphones are seen in a number of variations, i.e. cardioid, hypercardioid and supercardioid.
- A loudspeaker, a transducer that turns an electrical signal into sound waves, is the functional opposite of a microphone. Since a conventional speaker is constructed much like a dynamic microphone (with a diaphragm, coil and magnet), speakers can actually work "in reverse" as microphones.
- The best electret condenser microphones are capable of very high-quality performance, and are used extensively in broadcast, recording and sound reinforcement. Due in part to their low-mass diaphragms, condenser microphones are inherently lower in handling or mechanical noise than dynamic microphones.
Students taking the exam could only answer 'true' or false' and internet users are clearly divided about what the correct answer is. One user commented: "False: What is NOT a Microphone, what is a pronoun." This was a question on my sound recording test..
- Microphones pick up sound from very specific directions. Microphones with the latter type of pickup pattern are usually called bi-directional, or “Figure 8” mics. By the way, a microphone's directionality is also referred to by the term “polar pattern.”
- Proximity effect is the tendency for current to flow in other undesirable patterns---loops or concentrated distributions---due to the presence of magnetic fields generated by nearby conductors. In transformers and inductors, proximity-effect losses typically dominate over skin-effect losses.
- Ferranti Effect will not be dominating. Shut Reactor compensation at the receiving end might help to reduce the effect of Ferranti Effect. Shunt Reactor absorbs the excess reactive power generation during no load / light load condition and thus helps in stabilizing the voltage of Transmission Line.
Updated: 3rd October 2019