Question | Answer |
Loudness and pitch are important to determining | sound quality. |
Sound | wave that is produced by a vibrating object that travels through matter. |
The shorter the object | the higher the pitch. |
The longer the object | the lower the pitch. |
Disturbances | are back and forth motions that travel in the same direction as the medium. |
Our body's sound making instrutment is | our voice box (larynx). |
Larynx is the | voice box. |
The middle ear consists of a hammer, anvil and stirrup are the | eardrum. |
Sound waves vibrate particles. | sound waves vibrate particles. |
Kinectic energy | is transferred as particles are moved by compression. (particles are moving) |
Robert Boyle,a british scientist, used a clock | to show that sound must have a medium. |
The closer the molecules are | the faster sound travels. |
As temperatures increases | sound travels faster. |
Pitch is the | highness or lowness of a sound. |
Objects vibrating very fast produce | high-pitched sounds. |
Objects vibrating very slowly produce | a lower-pitched sounds. |
Cycle | one complete wave. |
People hear in a range of | 20 to 20,000HZ. |
Ground waves are used by elephants to communicate up to | 20 miles away. |
Ultrasounds are waves above | 20.000Hz. |
Resonance | is the the strengthing of a sound wave. |
The combination of waves produces sound quality known as | TIMBRE |
Oscilloscope is a | scientific instrument that tracks a electrical signal. |
Christian Doppler (Austrian scientist) | wrote a paper about how pitch changes when the sound source moves towards or away from a person. |
If frequency increases | the pitch increases. |
What makes a sound louder? | The amount of energy a wave has determines how soft or loud sound is. |
Decibel | the unit used to measure intensity |
Amplification | the increased strength of an electrical signal. |
Acoustics | the scientific study of sound. |
Echoes | reflected sound waves |
Echoes of ultrasound waves are used to find | food, detect underwater objects,etc |
Echolocation | 200 squeaks/second |
Sonar | sound navigation and ranging |
Sonar | is used my the military to combat the enemy |
Doppler ultrasound | is a technology that detects fluid movement through the body. |
3 main musical instruments | stringed, wind and percussion |
Tech toys to record sound | telephones, phonographs and CD players |