Instruments, tuning

1. Apr 29, 2010

crosbykins

1. The problem statement, all variables and given/known data

A trumpet is essentially an open air column. Assuming that it is tuned inside a warm building. When it is taken outside for a parade on a cold day, what will happen to the sound from the instrument?

2. Relevant equations

3. The attempt at a solution
-so outside the air is colder so sound travels slower...that's really all i have, help please! thanks in advance! :)

2. Apr 29, 2010

Stonebridge

There is a formula that tells you the frequency of the note produced in terms of v and the wavelength. You know that v will be less, and assuming the length of the tube doesn't change significantly (and thus the wavelength), you can work out what happens to the frequency.
Do you know this formula relating v, f and λ?

3. Apr 29, 2010

crosbykins

-so, f = v/lambda, since v is less than f will also be smaller, lower f means a lower pitch, so the instrument will produce lower sound...is that right

*thanks for the help

4. Apr 30, 2010

Stonebridge

That's a correct deduction. :)

5. Apr 30, 2010

crosbykins

thanks for the help!