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# Do Acoustic Tiles Really Block Sound

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Contents

## Introduction

In this experiment-do acoustic tiles really block sound, we will be determining whether or not acoustic tiles block sound as has been advertised.

We hypothesised that the Armstrong 933 acoustic tile could block most sound.

## Aim

To check if acoustic tiles block sound or not as it has been advertised.

## Theory

1. To reduce the unpleasant and unnecessary sound in a room, people use different kinds of material.

2. Acoustic tile is one such thing. It absorbs the reflected sound in a room when applied to the wall and ceiling of that room.

## Requirements

1. Fiberglass,

2. Pinewood,

3. Armstrong 755 Acoustic tiles,

4. Armstrong 933 Acoustic tiles,

5. Styrofoam,

6. A computer,

7. A box,

8. Notebook.

## Procedure

Step 1: Put a constant beep song on your computer with a hundred per cent sound.

Step 2: Insert various insulation through the top slot of the box.

Step 3: Make a hole in the front of the box.

Step 4: Insert a decibel meter through this hole.

Step 5: Decrease the computer volume until the decibel meter stops picking any sound.

Step 6: Turn on the computer volume again when the decibel meter stops picking up the sound.

Step 7: Repeat this experiment with each of the acoustic materials.

## Conclusion

Our observation includes the list of the effectiveness of some material in blocking the sound.

1. The Pinewood blocked the sound most – 90%.

2. Fiberglass came in second – 62%.

3. Armstrong 755 Acoustic Tile blocked sound by – 58%.

4. Armstrong 933 Acoustic Tile blocked sound by – 49%.

5. Styrofoam blocked the sound by – 31%

6. When there was nothing, the sound was blocked by – 15%

## Precaution

1. Use one material at one time.

2. The hole should not be large.

## Result

1. Our hypothesis is incorrect, in which we assume that the Armstrong 933 acoustic tile will block most of the sound.

2. In our experiment, we found that the pinewood blocked most of the sound (90%).

## Conclusion

In this experiment, we checked the effectiveness of acoustic tiles.

Q.1 What was the aim of your experiment?

ANS. To check if acoustic tiles block sound or not.

Q.2 Which material had blocked most of the sound?

ANS. The pinewood blocked most of the sound. Its effectiveness was 90%.

Q.3 Apart from using nothing, which material was least effective in blocking sound?

ANS. The least effective was styrofoam in blocking the sound. Its effectiveness was 31%.

Q.4 How was the effectiveness of Acoustic tiles in blocking the sound?

ANS. The acoustic tiles did not block the sound as it has been advertised. Their performance was average.

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