auditorium
TRANSCRIPT
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Acoustical considerations in the
Architectural Design of
Musical Auditoriums
Presented by
Ar.Jaiku
mar Ranganathan
Lecturer
Dept of Architectu
re,HCE
Chennai,India
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Acoustical considerations
Since no music hall is built for one specific type or style of music, the RT must be a meticulously established compromise. A carefully controlled RT will increase fullness of tone and will help loudness, definition, and diffusion.However,the establishing of an ideal RT alone is no guarantee that a hall will be acoustically excellent for the performance of music; it is a contributing factor only.
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Acoustical considerations Definition will be satisfactory if the initial time-Delay gap does not exceed 20 msec; if the direct sound is loud enough relative to the reverberant sound, that is, listeners are are reasonably close to the sound source; and if there is no echo.
Providing an adequate supply and distribution of bass tones over a large audience area( above 2500 seats) is a serious acoustical problem, in part because the fundamentals of several musical instruments are relatively week and most of the time only their harmonics are heard.
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Acoustical considerations
To achieve uniform quality of sound over the entire seating area balconies should not protrude too deeply into the air space of the room; listeners should have unobstructed sight lines so that they receive ample direct sound, the should be of reasonable size and proportion, and concave enclosures should be avoided.
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Acoustical considerations
Echo will be particularly noticeable if the RT is short and diffusion is inadequate. The longer the RT in a room, the less trouble can be expected from echo. The longer RT will cover up the single intrusions of an echo. In checking echo-producing spots, it should always be borne in mind that the acoustical design of rooms is a three dimensional problem.
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Acoustical considerations
The frequencies of sounds involved in the acoustics of music halls extend over a considerable wide range than those for speech, from about 30 Hz for certain musical instruments to about 12,000 Hz, including those high-frequency components of musical sounds which characterize some musical instruments.
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Acoustical considerations
Particular attention is required to control noises and vibrations originating from the heating, ventilation and air –conditioning system; from nearby spaces; mechanical and electrical rooms; and from surface, underground, and air transportation.
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