Measurement of the resonance curve (Acoustics)

[solid]

Few weeks ago I did this experiment with a 250 ml graduated cylinder and an open tube at both ends, 40 cm long and 28 mm in diameter.
I also told myself that the frequency dependencies of the speaker and the microphone could play a role here.

I had to think about this myself. In addition to this the frequency response depend from relative positions of speaker and microphone and theirs  positions inside the tubes. Some corrections in the following figure: upper panel - microphone and speaker outside the resonator, lower panel - the frequency response of the tube closed at one end corrected by upper curve..