The correct answer is telephone.
Telephone arose from an attempt to help hearing-impaired people.
Telephone is termed as a telecommunication which allows either two or more users to have a conversation while they are apart and to be heard directly.
Telephone converts human voice or sound to electronic signals which are being transmitted through cables.
Some of the elements which are essential in telephone are earphone which are termed as receiver and microphone which is the transmitter.
Most of the telephone they have a ringer which produces a sound to show that there is an incoming call.
Answer:
Sizable numbers of adolescents are sexually active. ... Their immature reproductive and immune systems make adolescents more vulnerable to infection by various STD agents.
Explanation:
Increased cholesterol
increased blood pressure
increased body weight
increased pain on knee on weight gain
decreased IQ on eating too much fat and oil !!
Answer:
Hmm.
Explanation:
A hearing aid amplifies sound waves.
<em>'A hearing aid is a small electronic device that you wear in or behind your ear. It makes some sounds louder so that a person with hearing loss can listen, communicate, and participate more fully in daily activities. A hearing aid can help people hear more in both quiet and noisy situations.'</em>
