Which of the following characteristics of sound help us in identifying two persons talking in a room without seeing them?

Options

A. Loudness
B. Pitch
C. Quality
D. Intensity

Answer

To solve the question of which characteristic of sound helps us identify two persons talking in a room without seeing them, we can analyze the given options step by step.

### Step 1: Understand the Options
The options provided are:
1. Loudness
2. Pitch
3. Quality
4. Intensity

### Step 2: Define Each Characteristic
- **Loudness**: This refers to the perceived volume of a sound, which is related to the amplitude of the sound wave. It helps us determine how loud or soft a sound is.

- **Pitch**: This is the perceived frequency of a sound, which determines how high or low a sound is. Different people can have different pitches in their voices.

- **Quality**: Also known as timbre, this characteristic refers to the unique quality or color of a sound that allows us to distinguish between different sound sources, even if they have the same loudness and pitch.

- **Intensity**: This is the power carried by sound waves per unit area in a direction perpendicular to that area. It is related to loudness but does not help in distinguishing between different sound sources.

### Step 3: Analyze the Question
The question asks which characteristic allows us to identify two persons talking without seeing them.

### Step 4: Determine the Correct Answer
- **Loudness** and **Intensity** do not help us distinguish between different voices; they only indicate how loud the sound is.
- **Pitch** can help differentiate between voices, but it may not be sufficient alone to identify who is speaking.
- **Quality** is the most significant characteristic because it encompasses the unique tonal qualities of each person’s voice, allowing us to recognize and differentiate between them.

### Conclusion
The characteristic of sound that helps us identify two persons talking in a room without seeing them is **Quality** (Option 3).

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