Let's take a look at this graph and look at the graph below.
[1]Top left graph
・Loud sound ( = amplitude → Big ) and high tone (= frequency → Big ) it has become.
[2]Graph on upper right
・Loud sound (= amplitude → Big ) and low tone (= frequency → Small ) it has become.
[3]Left bottom graph
・Small sound(= amplitude → Small ) and high tone (= frequency → Big ) it has become.
[4]Bottom right graph
・Small sound(= amplitude → Small ) and low tone (= frequency → Small ) it has become.
