How are directional microphones used?

The goal of directional microphones is to reduce the ambient (background) noise and increase the level of the desired speech. This can be done manually, automatically or both, depending on the instrument. Usually listeners are facing the person that they want to hear while the noise is located behind, in front and/or to the sides. Most hearing devices now come equipped with the technology that enable them to better determine the difference between speech and noise giving more amplification to the speech and less to the noise.

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