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.
All tires that are unidirectional will have an arrow on them