Acoustic Of The Whispering Hall | Science Experiment

by | Jun 14, 2022 | Physics, Experiments

Introduction

In this experiment, we will be studying the acoustic of the whispering hall.

Basic building concept

1. This experiment will deal with the channelling of sound along the curved surface rather than focusing on sound.

2. The sound wave travels along the curved surface of the gallery.

Materials required

1. Hardboard,

2. Small speaker,

3. Signal generator,

4. Amplifier,

5. An oscilloscope,

6. A filter,

7. A digital voltmeter.

Theory

1. In this experiment, we will be talking about a whispering gallery which is Gol Gumbaz.

2. This whispering gallery is present in Karnataka.

3. The whispering gallery got its name from a phenomenon called whisper. In all these types of galleries, a small whisper is amplified and carried to a distance of forty meters. The sound can be heard clearly from a great distance inside the gallery.

Procedure

Step 1: Using a hardboard, create a circular design resembling the Gol Gumbaz.

Step 2: Fix a small speaker inside the gallery to produce the sound.

Step 3: Fix a small microphone inside the gallery to receive the sound.

Step 4: Use high frequencies from 2.5 hertz to 20 hertz for producing short wavelengths.

Step 5: Fix two amplifiers, a signal generator, a filter, an oscilloscope, and a digit voltmeter.

Acoustic Of The Whispering Hall

THE GOL GUMBAZ

Observation

1. We have found that the sound waves travel along the curved surface of the model.

2. With the change in position of the microphone and speaker, the signal strength fluctuates.

3. On moving the speaker closer to the wall of the model, we have found less enhancement of the effect than expected.

4. At a lower frequency, performance has increased.

Result

We have conducted this experiment to study the acoustic of the whispering gallery, where we have found a new result in which less frequency produces more performance.

Precautions

1. The wall of the model should be circular.

2. Wall should be made of hardboard.

3. Place all the devices carefully.

4. The sound of the speaker should be between 2.5 hertz to 20 hertz.

Conclusion

In this way, we have studied the acoustic of the whispering hall.

Viva Questions with Answers

Q.1 What was the aim of your experiment?

ANS. To study the acoustic of the whispering hall.

Q.2 Why did you make the wall of the model with the help of a hardboard?

ANS. We used a hardboard because the real wall of Gol Gumbaz is made up of stone, and the hardboard showed the same result as the whispering gallery.

Q.3 Name the place where Gol Gumbaz is situated.

ANS. It is situated in Vijayapura, Karnataka, inside India.

Q.4 Why is it called a whispering gallery?

ANS. The whispering gallery got its name from a phenomenon called whisper. In all these types of galleries, a small whisper is amplified and carried to a distance of forty meters. The sound can be heard clearly from a great distance inside the gallery.

Q.6 Does the sound travel along the curved surface of the gallery?

ANS. Yes, the sound travels along the curved surface of the whispering gallery.

Q.7 What have you found more in this experiment?

ANS. Along with studying the acoustic of the whispering hall, we found that the less frequency given to the model produces greater performance.

 

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