keywords of class 8 science ch 13 . define all plz ^^
Answers
amplitude: the maximum displacement of vibrating body from its mean position is called amplitude.
eardrum:the membrane of the middle ear, which vibrates in response to sound waves; the tympanic membrane.
frequency:the number of cycles or vibrations undergone in one unit of time.
hertz:Hertz (Hz) is a unit of frequency, defined as the number of complete cycles of a periodic signal that take place in one second.
larynx: A tube-shaped organ in the neck that contains the vocal cords.
loudness:it depends on intensity of waves or sound and amplitude .it determines how loud or feeble a sound is.
noise:it is the unwanted sound which is unpleasant to hear.
oscillation: the repeated to and fro motion is called oscillation.
pitch: the shrillness of sound is called pitch.
time period:Time period is defined as a vibrating particle to complete one vibration oscillation.
vibration:Vibration means quickly moving back and forth (or up and down) about a point of equilibrium and produces sound.
voice box:also called larynx .it is an organ in our neck that contains vocal cords.
wind pipe: also called trachea .it is a part of the respiratory system that channels air into the bronchi during respiration.