Sound is caused by vibrations. When something vibrates, the air particles around it vibrate. Those travel to our ear, which causes our ear drum and then small tiny bones in our inner ear to vibrate. That causes a nerve to send an electrical signal to our brain that says it's a sound.
We made chicken cups today. In our lab, we saw that when we played the string, that was mechanical energy. The mechanical energy of us moving our fingers up and down the string led to friction. Friction caused the string to make sound. You can't have sound energy without mechanical energy. Something is always moving to make a sound. The cup amplified the sound. The viration of the string, caused the particles in the air to vibrate which hit the cup and led to our ears.
Frequency is how often the sound waves occur.
Our vocal cords and strings on instruments work a lot a like. The length determines the pitch. Small vocal cords vibrate faster, so they have high frequency sound waves. This leads to a high pitched voice. Short harp strings do the same. They vibrate faster, so they produce a high pitch sound.
Big vocal cords vibrate more slowly, so they have lower frequency of sound waves. This means people with bigger vocal cords have lower voices.
In our chicken cup lab, the length and thickness of the string determines the pitch. The shorter, the higher. The longer, the lower. The cup size determines the loudness, or the intensity or volume. The bigger the cup, the louder the sound.
We made chicken cups today. In our lab, we saw that when we played the string, that was mechanical energy. The mechanical energy of us moving our fingers up and down the string led to friction. Friction caused the string to make sound. You can't have sound energy without mechanical energy. Something is always moving to make a sound. The cup amplified the sound. The viration of the string, caused the particles in the air to vibrate which hit the cup and led to our ears.
Frequency is how often the sound waves occur.
Our vocal cords and strings on instruments work a lot a like. The length determines the pitch. Small vocal cords vibrate faster, so they have high frequency sound waves. This leads to a high pitched voice. Short harp strings do the same. They vibrate faster, so they produce a high pitch sound.
Big vocal cords vibrate more slowly, so they have lower frequency of sound waves. This means people with bigger vocal cords have lower voices.
In our chicken cup lab, the length and thickness of the string determines the pitch. The shorter, the higher. The longer, the lower. The cup size determines the loudness, or the intensity or volume. The bigger the cup, the louder the sound.