A vibrating body should oscillate minimum how many times per second to make an audible sound for humans?

Options

A. 10 times
B. 20 times
C. 30 times
D. 40 times

Explanation

To determine the minimum number of times a vibrating body should oscillate per second to produce an audible sound for humans, we can follow these steps:

### Step 1: Understand the frequency range of human hearing
Humans can typically hear sounds in the frequency range of 20 Hz to 20,000 Hz. This means that for a sound to be audible, it must fall within this range.

### Step 2: Identify the minimum frequency
The minimum frequency that can be heard by humans is 20 Hz. This means that a vibrating body must oscillate at least 20 times per second to produce a sound that is audible.

### Step 3: Conclusion
Therefore, the minimum number of oscillations required for a sound to be audible to humans is 20 times per second.

### Final Answer
A vibrating body should oscillate a minimum of **20 times per second** to make an audible sound for humans.

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