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Amphitheaters and auditorium walls are f...

Amphitheaters and auditorium walls are fitted with ............ To avoid the echoing of sound.

A

granite

B

Italian marble

C

sound absorbers such as foam board

D

wooden wall

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To answer the question, "Amphitheaters and auditorium walls are fitted with ............ To avoid the echoing of sound," we need to identify the correct material that is used to minimize sound reflection and echo in these spaces. ### Step-by-Step Solution: 1. **Understanding the Problem**: The question asks for a specific type of material used in amphitheaters and auditoriums to prevent echoing. Echo occurs when sound waves reflect off hard surfaces. 2. **Analyzing the Options**: The options given are: - A) Grey night - B) Italian marble - C) Sound absorbers such as foam board - D) Wooden wall 3. **Evaluating Each Option**: - **A) Grey night**: This is not a known sound-absorbing material. - **B) Italian marble**: This is a hard surface that reflects sound rather than absorbs it, making it unsuitable for reducing echo. - **C) Sound absorbers such as foam board**: Foam board is designed to absorb sound waves, reducing reflection and echo. It often has a porous structure that increases its surface area, making it effective for sound absorption. - **D) Wooden wall**: While wood can absorb some sound, it is not as effective as specialized sound-absorbing materials like foam. 4. **Selecting the Correct Answer**: Based on the analysis, the best option is **C) Sound absorbers such as foam board**. Foam boards are commonly used in theaters and auditoriums to minimize echo. 5. **Conclusion**: Therefore, the walls of amphitheaters and auditoriums are fitted with sound absorbers such as foam board to avoid the echoing of sound. ### Final Answer: Amphitheaters and auditorium walls are fitted with **sound absorbers such as foam board** to avoid the echoing of sound. ---
To answer the question, "Amphitheaters and auditorium walls are fitted with ............ To avoid the echoing of sound," we need to identify the correct material that is used to minimize sound reflection and echo in these spaces. ### Step-by-Step Solution: 1. **Understanding the Problem**: The question asks for a specific type of material used in amphitheaters and auditoriums to prevent echoing. Echo occurs when sound waves reflect off hard surfaces. 2. **Analyzing the Options**: The options given are: - A) Grey night ...
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