A student studies the behavior of sound using a wave generator made from a string tied to a fixed support and connected to a driver that is controlled by a remote. The driver vibrates the string by moving it up and down, creating waves on the string. The vibrations per second in the driver are increased, and the images show how the waves on the string change.

Frequency is decreasing.

Frequency is increasing.

Loudness is decreasing.

Loudness is increasing