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Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal.
A room with a number of informal meeting spaces of varying sizes. Depending on the purpose of the meeting, conference rooms may be set up in various styles. Sometimes the furniture may even be moved easily before a meeting to accommodate the particular needs of each meeting.
The most appropriate reverberation time depends on the use of the room. RT60 is a measure of reverberation time. [9] Times about 1.5 to 2 seconds are needed for opera theaters and concert halls. For broadcasting and recording studios and conference rooms, values under one second are frequently used. The recommended reverberation time is always ...
The most common technique for counting crowds at protests and rallies is Jacobs' method, named for its inventor, Herbert Jacobs.Jacobs' method involves dividing the area occupied by a crowd into sections, determining an average number of people in each section, and multiplying by the number of sections occupied.
Room modes are the collection of resonances that exist in a room when the room is excited by an acoustic source such as a loudspeaker. Most rooms have their fundamental resonances in the 20 Hz to 200 Hz region, each frequency being related to one or more of the room's dimensions or a divisor thereof. These resonances affect the low-frequency ...
In a reverberant space, the sound perceived by a listener is a combination of direct and reverberant sound. The ratio of direct sound is dependent on the distance between the source and the listener, and upon the reverberation time in [the room]. At a certain distance the two will be equal. This is called the "critical distance."
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The Situation Room is an intelligence management complex on the ground floor of the West Wing of the White House.While the name suggests it is a single room, it is in fact a 5,000 square feet (460 m 2) operations suite consisting of a duty watch station and three secure conference rooms.
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