Effect of Temperature on Frequency

[missileblitz]

Homework Statement

Sound travels slower in the cold air than warm air. If you place your sound system outside on a cold winter night and listen to your favourite music, will the frequency of the sound change (pitch change)?

Homework Equations

f x (lambda)= v

The Attempt at a Solution

Basically from what I can observe from the formula, either one can be constants, but I don't know which. However when I look at this formula f = v/(lambda), frequency seems to have a constant relationship with velocity. Does that mean that when the speed decreases, the frequency should too?

 

[arkofnoah]

think density of air. which (speed, frequency or wavelength) changes when the density of the medium changes?

 

[missileblitz]

I'm confused. When the density of the medium changes, doesn't the speed and wavelength change, hence a change in frequency hence f = v/(lambda)?

 

[arkofnoah]

I'm confused. When the density of the medium changes, doesn't the speed and wavelength change, hence a change in frequency hence f = v/(lambda)?

this is flawed logic. look at the equation. what will happen to the frequency when speed and wavelength both increase by half, for instance?

hint: one of the three, speed, wavelength and frequency, remains constant.

what do you think is the source of a particular frequency of sound?

 

[missileblitz]

this is flawed logic. look at the equation. what will happen to the frequency when speed and wavelength both increase by half, for instance?

hint: one of the three, speed, wavelength and frequency, remains constant.

what do you think is the source of a particular frequency of sound?

Ah of course, the frequency remains constant.