LOSSES IN TUBULAR ACOUSTIC SYSTEMS - THEORY AND EXPERIMENT IN THE SAMPLED TIME AND FREQUENCY DOMAINS

In this paper we examine the practical aspects of measuring the impuls e response of a tubular acoustic system, taking into account thermal a nd viscous attenuation. Though good approximations for the frequency r esponse of such a system exist for the continuous time and frequency c ase, we show that transforming these approximations to the discrete ti me domain is not trivial. We show how the discrete impulse response ca n be calculated theoretically using methods derived from digital filte r design, and compare the theoretical calculations to experimental res ults. The comparison shows an improvement in the agreement between the oretical and experimental results, in comparison to previously publish ed results.