Background Info:

In class we did and assignment where we were doing test around the room checking items to see how exactly sound is made/produced. When testing, I have achieved many results so, allow me to share those information down below.

Questions:

The first scientific I am be investigating is how is sound made.

The second scientific I am investigating is what determines the pitch of sound.

Data/Evidence:

The small tuning fork vibrated faster. 

The violin string vibrated while being played.

The singers vocal chords vibrated while she sang. 

The ukulele vibrated when it was played.

The cymbal vibrated when it was played.

The foil showed that the tuning fork vibrated.

The drum vibrated when it was hit.

When humming, I was able to feel my throat vibrating. 

The tuning fork was vibrating when it was hit but also made a sound.

The smaller tuning fork had a higher pitch and the larger tuning fork had a lower pitch.

 

Analysis:

All of the instrument vibrated when making sound.

The smaller tuning fork vibrated about 2x faster than the larger tuning fork.

 

Claim:

The sound is caused by the vibration of objects.

The pitch of a sound is determined by the speed/frequency of vibration. The faster the vibration, the higher the pitch. 

 

Reasoning:

My research suggest that sound is caused by vibrations because all of the instruments vibrated when making sound. 

My research suggests that the pitch of a sound is determined by the speed/frequency of the vibration because the tracings showed that the higher tuning fork vibrated faster.

 

Significance:

This means if I want to build a machine that can make any sound, the machine must be able to vibrate at any frequency.