SOUND - QUICK QUESTION ABOUT FREQUENCY FORMULAS

[Hutchoo]

Fn = nv/2L for tubes open at both ends AND closed at both ends.

Fn = nv/4L for tubes that are open at one end/closed at the other end.

Is this correct?

[StumbleBum]

Fn = nv/2L for tubes open at both ends AND closed at both ends.

Fn = nv/4L for tubes that are open at one end/closed at the other end.

Is this correct?

Yeh that's correct, however don't forget that only odd harmonics exist for "open at one end/closed at the other end" so

[Hutchoo]

Fn = nv/2L for tubes open at both ends AND closed at both ends.

Fn = nv/4L for tubes that are open at one end/closed at the other end.

Is this correct?

Your open tube formula is correct.

Your closed at one end formula is not, it should like this:



Where n is the harmonic.

Can anyone back this up?

[StumbleBum]

Can anyone back this up?

Yes that's correct as only odd harmonics will exist.

[availn]

Fn = nv/2L for tubes open at both ends AND closed at both ends.

Fn = nv/4L for tubes that are open at one end/closed at the other end.

Is this correct?

Your open tube formula is correct.

Your closed at one end formula is not, it should like this:



Where n is the harmonic.

Can anyone back this up?

My bad, the harmonics that exist are the 1st, 3rd, 5th, etc. Sorry for the misinformation, thought that they were still called the 1st, 2nd, 3rd...

[StumbleBum]

My bad, the harmonics that exist are the 1st, 3rd, 5th, etc. Sorry for the misinformation, thought that they were still called the 1st, 2nd, 3rd...

What you men't was the overtones, where there is the 1st, 2nd, 3rd.... which correspond to the 1st, 3rd, 5th.... harmonics

[Hutchoo]

Nahnah, I know the harmonics etc, I mean the formula!

[StumbleBum]

Nahnah, I know the harmonics etc, I mean the formula!

Yes that formulae is fine, however it should be noted that when n=1 then that corresponds to the first harmonic, when n=2 that corresponds to the 3rd harmonic and when n=3 that corresponds to the 5th harmonic, so on so forth. (Because only odd harmonics exist for that type of tube)

It's probably easier to just use your formulae but make sure you define

[Hutchoo]

Thanks guys, you're all champs!

[availn]

My bad, the harmonics that exist are the 1st, 3rd, 5th, etc. Sorry for the misinformation, thought that they were still called the 1st, 2nd, 3rd...

What you men't was the overtones, where there is the 1st, 2nd, 3rd.... which correspond to the 1st, 3rd, 5th.... harmonics

Yeah, but I still stuffed it up, as the 1st, 2nd, 3rd... overtones correspond to the 3rd, 5th, 7th... harmonics.

But yeah, your original formula is correct, just plug only odd numbers in.

[StumbleBum]

[size=78%]Yeah, but I still stuffed it up, as the 1st, 2nd, 3rd... overtones correspond to the 3rd, 5th, 7th... harmonics.[/size]

But yeah, your original formula is correct, just plug only odd numbers in.

Oh yeh, forgot about fundamental. Whoops.