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Information about auditorium

Published on April 3, 2008

Author: mickeyjai

Source: slideshare.net

Acoustical considerations in the Architectural Design of Musical Auditoriums Presented by Ar.Jaikumar Ranganathan Lecturer Dept of Architecture,HCE Chennai,India

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Thank you

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