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. Author manuscript; available in PMC: 2019 Jul 24.
Published in final edited form as: Combust Flame. 2017 Nov 6;189:46–61. doi: 10.1016/j.combustflame.2017.10.019

Table 1:

Theoretical and experimental resonant frequencies and wavelengths

Speaker Operation (180° out of phase) with PN at x = 0 cm
Theoretical Experimental
n L fa,th [Hz] λth [cm] fa,exp [Hz] λexp [cm]
1 61 281 122 332 103
1 31 553 62 586 58.5
3 61 843 40.7 898 38.2