# Homework Help: Traveling waves HELP

1. Feb 22, 2009

### nubey1

1. The problem statement, all variables and given/known data
A loudspeaker at the origin emits sound waves on a day when the speed of sound is 340 m/s. A crest of the wave simultaneously passes listeners at the coordinates (38m,0m) and (0m,29m). What are the lowest two possible frequencies of the sound?

2. Relevant equations
D(x,t)=Asin(kx-wt+$$\phi$$)
D(y,t)=Asin(kx-wt+$$\phi$$)

3. The attempt at a solution
I do not know where to start with this problem. I recieved some advice from the TA, but I am still confused.

2. Feb 23, 2009

### lanedance

assume the wave eminates spherically from the speaker

the fact that they are different distances from the speaker means the listeners both hear different crests at the same time....