Flute acoustics: measurement, modelling and design - School of ...

100 CHAPTER 6. MATERIAL AND SURFACE EFFECTS
10 9 Frequency (Hz)
10 8
pre−treatment
after 5 weeks of treatment
1 week post−treatment
|Z| (Pa s m −3 )
10 7
10 6
10 5
10 4
0 500 1000 1500 2000 2500 3000 3500 4000
Figure 6.2: Impedance spectra for pipe 1 before, during and one week after treatment.
10 9 Frequency (Hz)
10 8
pre−treatment
after 5 weeks of treatment
1 week post−treatment
|Z| (Pa s m −3 )
10 7
10 6
10 5
10 4
0 500 1000 1500 2000 2500 3000 3500 4000
Figure 6.3: Impedance spectra for pipe 2 before, during and one week after treatment.