A sudden sound in the middle of a silence is like a pebble dropped into a pool, ripples travel outward from the center of the disturbance. These ripples or sound waves reach the ear and thought it to the brain.
Strike a bell and touch it it's surface quivers with vibrations. It's even possible to see these vibrations through their to and from movements are so rapid that the bell may just look blurred. The distance to and from that of a vibrating surface move from it's position of rest is the amplitude of the vibrations.
The greater the amount of energy used to produce the vibrations the greater it's amplitude will be. The greater the amplitude the louder the sound will be.
To make a sound that we can hear, vibrations must be rapid. A bee buzzes but a butterfly is silent because the movement of it's wings it is too slow to be audible. Our ears can hear sounds from about 20 to 20,000 vibrations per second . In a acoustic which is a science of hearing the number of vibrations per second is called FREQUENCY . The greater frequency the higher the sound.
The greater the amount of energy used to produce the vibrations the greater it's amplitude will be. The greater the amplitude the louder the sound will be.
To make a sound that we can hear, vibrations must be rapid. A bee buzzes but a butterfly is silent because the movement of it's wings it is too slow to be audible. Our ears can hear sounds from about 20 to 20,000 vibrations per second . In a acoustic which is a science of hearing the number of vibrations per second is called FREQUENCY . The greater frequency the higher the sound.
