Impedance models of pipes can be used to estimate resonant frequencies of standing waves and model
acoustic pressure of closed and open ended pipes. Modelling a pipe with impedance methods allows
additional variations to the pipe to be included in the overall model as a system. Therefore an
actuator can be attached and used to drive the system and the impedance model is able to include the
dynamics of the actuator. Exciting the pipe system with a chirp signal allows resonant frequencies
to be measured in both the time and frequency domain. The measurements in the time domain are
beneficial for introducing undergraduates to resonances without needing an understanding of fast
Fourier transforms. This paper also discusses resonant frequencies in open ended pipes and how
numerous texts incorrectly approximate the resonant frequencies for this specific pipe system.