1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Instruments, tuning

  1. Apr 29, 2010 #1
    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. jcsd
  3. Apr 29, 2010 #2
    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?
  4. Apr 29, 2010 #3
    -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:smile:
  5. Apr 30, 2010 #4
    That's a correct deduction. :)
  6. Apr 30, 2010 #5
    thanks for the help!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook