A sound with a single frequency is called a pure tone. A healthy young person hears sounds...

A sound with a single frequency is called a pure tone. A healthy young person hears sounds with frequencies from around 20 to 20,000 Hz. Pure tones are used in pushbutton telephones. These phones simultaneously produce two pure tones when each button is pressed. Each number on the phone produces a difference pair of tones,

The following graphs display pressure patterns for pure tones of a 10-Hz wave and * n \ wave for a time interval of one second:

a. Find the equations to represent the pressure patterns for pure tones P1 and P2

b. To see the resulting pressure when these two patterns overlap, use a graphing until ity to graph y = P1 + P2. Determine whether this graph can be represented t I sinusoidal function of the form y = Asin[B(x-C)] + D.

c. What is the period of y = P1 + P2?