The correct answer is C. 50Hz to 15000 Hz.
The range of normal human hearing is from 20 Hz to 20,000 Hz. However, most people can only hear sounds between 50 Hz and 15,000 Hz. The range of hearing can vary from person to person, and it can also decrease with age.
Sound is a wave that travels through the air. When a sound wave reaches our ear, it causes the eardrum to vibrate. These vibrations are then transmitted to the inner ear, where they are converted into electrical signals that are sent to the brain. The brain interprets these signals as sound.
The frequency of a sound wave is the number of times it vibrates per second. The higher the frequency, the higher the pitch of the sound. The human ear can hear sounds with frequencies between 20 Hz and 20,000 Hz. However, most people can only hear sounds between 50 Hz and 15,000 Hz.
The range of hearing can vary from person to person. Some people are able to hear sounds at frequencies above 20,000 Hz, while others are only able to hear sounds at frequencies below 20 Hz. The range of hearing can also decrease with age. As we age, the eardrum and other parts of the ear become less sensitive, and we may not be able to hear sounds as well as we used to.
There are a number of factors that can affect our hearing, including age, exposure to loud noise, and certain medical conditions. If you are concerned about your hearing, it is important to see a doctor for a hearing test.