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The polar pattern helps you identify the area around the microphone where the audio pick up is very good. If the sound source is placed within this area, the microphone can produce output of excellent quality. When the sound source is out of this area, the sound [link widoczny dla zalogowanych] is although picked by the microphone, but the quality of output is poor.
The bidirectional polar patterns are also called figure-8 patterns since the polar [link widoczny dla zalogowanych] pattern produced is of the shape of 8. The bidirectional microphones pickup sound from two directions i.e. the front and the rear and reject the sound from sides. These produce natural sound and hence are used in headsets, broadcast microphones and studios.
Cardioid polar pattern is one of the most common unidirectional polar patterns. Cardioid microphones are so called this because the polar patterns produced by these are heart shaped. Cardioid microphones pick up sound from within 120 degrees of the direction in which they are faced. The Cardioid pattern helps in recording the sound that is directly in front of the microphone and produces a rich and high quality sound.
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In omnidirectional polar pattern, which is also known as non-directional polar pattern, [link widoczny dla zalogowanych] the sound is picked up from all directions i.e. 360 degrees. This pattern gives a uniform frequency response to all range of frequencies from all directions.
Based on direction of pickup, the microphones can be classified as omnidirectional, unidirectional and bidirectional polar patterns. To achieve the desired polar patterns, various principles are being used in the design of the microphone.
Cardioid microphone can be considered as a combination of an omnidirectional and a bidirectional microphone. The microphone has at the back, the negative signal of the bidirectional [link widoczny dla zalogowanych] microphone and the positive signal of the omnidirectional microphone, that cancels each other and at the front the positive signals from both add up.
Some microphones are designed to pick up sound equally from all [link widoczny dla zalogowanych] directions, while some microphones are designed for picking up from particular directions. The sensitivity of the microphones to sounds from different [link widoczny dla zalogowanych] directions or angles can be depicted by the polar pattern.
Due to this feature, [link widoczny dla zalogowanych] the microphones with omnidirectional pattern are not [link widoczny dla zalogowanych] good [link widoczny dla zalogowanych] at [link widoczny dla zalogowanych] blocking the unwanted sound. The microphones with omnidirectional pattern produce a very natural sound and hence are best suitable for live performances and for recording the crowd noises like in sports.
A Stereo pattern is nothing but a combination of two patterns usually two cardioid patterns. The two microphones in this pattern are integrated to form a single unit. Microphones with this pattern are used for broadcasting or field recording.
The unidirectional polar patterns are designed to pick up sound from one particular direction. The microphones with unidirectional polar pattern can [link widoczny dla zalogowanych] be adjusted towards the direction of the sound source. The microphones with this type of [link widoczny dla zalogowanych] polar pattern reject the [link widoczny dla zalogowanych] unwanted sound that is produced at the sides and the rears. The microphones with unidirectional polar pattern are best suitable for use in [link widoczny dla zalogowanych] television broadcasting.