Camcorder microphones capture and record audio signals by changing the air pressure of sound in the environment into electrical currents. A typical camcorder microphone has three physical components: capacitance, resistance, and inductance. These components determine the amount of sound current that can flow in the circuit.
An omni-directional camcorder microphone can capture sound from all directions. It is generally huge and heavy, and can be attached on top or at the side of the camcorder. It produces mediocre sound quality because it captures all the different sounds in the environment. Omni-directional Camcorder Microphones are ideal for shooting choir performances but not concerts, plays, or interviews.
A built-in camcorder microphone is permanent installed in the camcorder. It is smaller and more convenient to use than an omni-directional microphone, and is commonly found in smaller and more portable camcorders. It can be built in the front-end, top, or at the side of the camcorder. It is ideal for almost all types of shooting. Sometimes, camcorder microphones can also capture ambient noise in the surroundings.
Microphone location: Choose a camcorder microphone that is located in the front end rather than on top or at the side of the camera. This position is ideal as it lets the unit capture more balanced audio signals.
Zoom feature: Look for a camcorder microphone with a zoom feature that narrows the area of the sound that needs to be captured. Usually, the built-in zoom for the camcorder microphone is synchronized with the lens, allowing the main audio to come directly from the image being captured.
Wind protection: Choose a camcorder microphone with a wind protection feature that prevents the sound of the wind (when it hits the microphone) from being recorded. The wind protection or filter works by removing the low sonic frequencies that create the rumbling sound brought by the wind. However, the wind filter sometimes affects the mid-range frequencies, resulting to nasal voices.
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