That is a microphone which receives the sound only from a small angle of direction; like a gun microphone.
Yes it can be used as a unidirectional microphone if needed.
Yes, it is unidirectional.
The microphone is unidirectional. The committee had a unidirectional approach to the problem and not everybody was satisfied.
Unidirectional
The cardioid or unidirectional microphone is the most common type of microphone pickup pattern. It is used everywhere, from voice to instruments.
The Shure SM58® unidirectional (cardioid) dynamic vocal microphone has a rugged construction, that even with rough handling will perform consistently.
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Unidirectional - Unidirectional Unidirectional Unidirectional Unidirectional Unidirectional Unidirectional Unidirectional Unidirectional Unidirectional ! HAHA :)
A multi-directiional or omnidirectional microphone is one that will pick up sounds from all round it. Compare this to a unidirectional microphone which will only pick up sounds from the direction in which it is facing.
That would be a unidirectional mic. Microphones have varying pickup patterns, though, and you might also be talking about a cardioid or hypercardioid microphone, which pick up significantly better in some directions than in others though they aren't strictly speaking unidirectional.
No the word unidirectional is not a noun. It is an adjective.
With VoIP on the rise and teleconferencing over the web, you need to have a good quality input device. A headset typically sits on top of your head allowing you to talk into it. A microphone is usually held in the hand or put on a stand to mount on the desk. If you want to make the decision on what you need, take some things into account before buying. You want to have a good frequency response rate of 100 hz- 8 kHz. Any lower, and you will not get the device to pick up on all the frequencies needed to record your vocal conversations. An omni-directional microphone picks up sounds from all directions, which can be good. Although a unidirectional microphone picks up frequencies from one direction, they can both have their advantages and disadvantages. Omni microphones will pick up more noise in the room, while the unidirectional will pick up your voice better. But the unidirectional will not pick up noise in the room like the Omni. So unless you need omnidirectional response to pick up the whole room, choose a unidirectional microphone. You can usually get a headset microphone that comes built in with headphones. A simple USB connection will be needed, unless it is a dual- plug with audio/headphones separate. USB sets can have an onboard DSP to convert the signal to digital before it enters the computer. Headsets also usually have a unidirectional mic with noise cancelling features to get rid of nasty background noises. The quality on the USB headsets will also be better. Poor quality of desktop computer microphones for anything but basic web chat is irrelevant. If you are going to be doing any professional conferencing, or even the casual VoIP conversations, invest in a headset microphone. Although a USB headset may cost a little more than the typical analog headset or computer desktop mic it is well worth it.