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Lecture halls and conference rooms pose the challenge of reproducing speech clearly in a large hall, which may have reflective, echo-producing surfaces. One issue with reproducing speech is that the microphone used to pick up the sound of an individual's voice may also pick up unwanted sounds, such as the rustling of papers on a podium.
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. Because conventional microphone diaphragms are relatively large (> 1 cm diameter), phase interference from surface sound reflections ...
The Neumann U 47 is a large-diaphragm condenser microphone. It is one of the most famous studio microphones and was Neumann's first microphone after the Second World War. The original series, manufactured by Georg Neumann GmbH between 1949 and 1965, employed a tube design; early U 47s used the M 7 capsule, then replaced by the K 47 from 1958.
Omnidirectional microphones are connected to the console, as well as a TV monitor with loudspeakers and/or a video projector. There are several types of dedicated videoconferencing devices: Large group videoconferencing are built-in, large, expensive devices used for large rooms such as conference rooms and auditoriums.
On the other hand, lecture halls are excellent for focusing the attention of a large group on a single point, either an instructor or an audio-visual presentation, and modern lecture halls often feature audio-visual equipment. A microphone and loudspeakers are common to help the lecturer be heard, and projection screens may be used for large ...
Conference Room Sign. It is commonly found at large hotels and convention centers though many other establishments, including even hospitals, [1] have one. Sometimes other rooms are modified for large conferences such as arenas or concert halls. Aircraft have been fitted out with conference rooms. [2] Conference rooms can be windowless for ...
One or more microphones are placed along the length of the room, and these pick up both the sound from the speaker and its reflections off the walls of the chamber. The farther away from the loudspeaker, the more echo and reverberation the microphone(s) picks up, and the louder the reverberation becomes in relation to the source.
For large-membrane microphones such as in the Oktava (pictured above), the upward direction in the polar diagram is usually perpendicular to the microphone body, commonly known as "side fire" or "side address". For small diaphragm microphones such as the Shure (also pictured above), it usually extends from the axis of the microphone commonly ...
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