1. What are the different characteristics of sound? How does each property differ from one another?
2. Why does sound is best heard when under water than above the surface?
3. How do the pitch and wavelength of a sound wave relevant to one another?
4. Ear is an important organ for hearing and balance. How does each part of the ear coordinates with one another
for the function of hearing and sound interpretation?
5. Noise pollution is a sound that has adverse effect on humans. Its damaging impact causes health issues like loss
of hearing, high blood pressure, stress, distraction, and even loss of tranquillity. As a student, what ways would you
suggest to reduce noise pollution?

1. Sound is a longitudinal wave which consists of compressions and rarefactions travelling through a medium. Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed

2. Sound waves actually travel five times faster in water than in air. Underwater those sound waves don't vibrate the ossicles bones in your inner ear. They go straight to the skull bones, vibrating that heavy bone you can touch just behind your ear. Because of that, you can hear higher frequencies underwater

3. People can hear sounds that range from about 20 to about 17,000 hertz. The word that musicians use for frequency is pitch. The shorter the wavelength, the higher the frequency, and the higher the pitch, of the sound. In other words, short waves sound high; long waves sound low.

4. Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.

5. you may do one of the following

Turn off Appliances at Home and offices

Shut the Door when using noisy Machines

Use Earplugs

Lower the volume

Stay away from Noisy area

Follow the Limits of Noise level

Control Noise level near sensitive areas

Go Green by planning trees

This one is a huge ANSWER please let me know if this really helps you