The material generally used for sound proffing of rooms like a recording studio and auditorium, etc. is

Options

A. cotton
B. coir
C. wood
D. styrofoam.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Soundproofing**:
- Soundproofing refers to the process of reducing the sound that enters or leaves a room. It is essential in environments where sound control is critical, such as recording studios and auditoriums.

2. **Identifying Soundproof Materials**:
- To determine which material is best for soundproofing, we need to consider the properties of the materials listed: cotton, coil, wood, and styrofoam.

3. **Analyzing Each Option**:
- **A. Cotton**: While cotton can absorb some sound, it is not typically used for soundproofing large areas effectively.
- **B. Coil**: This option is vague and does not specifically refer to a soundproofing material.
- **C. Wood**: Wood can be used in soundproofing, but it does not provide the best sound absorption compared to other materials.
- **D. Styrofoam**: Styrofoam is known for its excellent sound-absorbing properties. It acts as a cushion and effectively reduces unwanted noise.

4. **Conclusion**:
- After evaluating the options, the best material for soundproofing rooms like recording studios and auditoriums is **styrofoam**.

**Final Answer**: The material generally used for soundproofing of rooms like a recording studio and auditorium, etc. is **styrofoam**.

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