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Sound Wave topics

Sound Waves

Creating Sound Waves

Frequencies and Wavelengths

Speed of Sound in a Gas

Doppler Effect

Doppler Effect Equations

Traveling Faster than Sound

Making Sounds with Musical Instruments

Sound or Music from a String

Equation for Sound from a String

Detecting Sound Waves

How Obstacles Affect Sound Waves

Echoes

Sound Amplified Over Water

Reproducing Sounds

Beat Frequencies in Sound

Acoustics in Buildings

Noise Reduction

Active Noise Cancellation

Hearing


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Answers to Readers' Questions on Sound and Acoustics in Buildings. Also refer to physics, sound, concert hall, auditorium, factory, apartment, echo, reverberation, quality, suppression, noise, acoustical tiles, Ron Kurtus, School for Champions. Copyright © Restrictions

Answers to Readers' Questions on Sound and Acoustics in Buildings

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Why are the acoustics in Bada Imambada so good?

Question

February 16, 2009

You have provided with a good material on acoustic buildings, but my question is concerned with a historical building.

In Bada Imambada (that's a historical monument in Lucknow, UP, India), if we light a match-stick at one corner of hall (170 feet), the sound is heard at the other end. Why?? and How??

In the same building, when in Bhul-Bhulaiya, one can hear if someone speaks into the wall by giving his ears at the wall. Please explain?

Nishat - India

17283

Answer

Bada Imambada is famous for its good acoustics, as well as the large, unsupported ceiling. Since the walls are very thick and the air is very still in the building, sound is not absorbed by the walls or distorted by the air. Also, outside noise is not heard in the building, and thus quiet sounds are more readily heard.

It is said that a person can hear his echo bouncing back and forth seven times in Bada Imambada. A problem in buildings with poor acoustics is that there are numerous echoes and reverberations that distort the sound and change it to noise.

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