How are the sound wave when whispering?

Answer 1

As compared to a louder sound, a soft sound would have a lower intensity, that is, less power. This also means the sound wave has less amplitude.

Answer 2

When whispering, the sound waves produced are of lower intensity and frequency compared to normal speech. The amplitude of the sound wave is reduced, resulting in a softer and less audible sound. This is why whispering is often used in situations where you want to keep a conversation private or not disturb others nearby.