This is because the wearer may not need or desire the noise-reducing properties of the directional microphone in a given situation.
22.
Maetel tells him she had heard the entire incident with a long-range directional microphone she had been idly scanning around the area with.
23.
In addition to the angular dependence described above, the response of a directional microphone depends on the amplitude, frequency and distance of the source.
24.
The hearing aid industry is a very lucrative and competitive market, and the effectiveness of a manufacturer's directional microphone is a big selling point.
25.
Two years later, Shure invented the Unidyne, the world's first single-element directional microphone, which remains one of the most widely used microphone types in the world.
26.
While some models simply amplify sound, others are more sophisticated designs, providing directional microphones and customizable equalization of the audio signal to clear up ambient or extraneous noise.
27.
Researchers have discovered that the fly has the biological equivalent of directional microphones in its ears; they hope their studies will lead to a better hearing aid for people.
28.
Directional microphones in the fingertips allow the user to hear and record audio through walls or at a distance-this data can then be transferred to a separate microchip as evidence.
29.
The predecessor of the directional boundary microphone was a directional microphone placed in an Electrovoice Mic Mouse, a foam block that suspended a conventional microphone horizontally just above a surface.
30.
This was made a little easier by digital hearing aids introduced in the late'90s, which used directional microphones to detect the trajectories of sounds, and compression systems to clarify them.
