Optimizing Acoustical Parameter-Extraction Methods

Friday, September 9, 2016
4:00 p.m. in ETC 4.150

Dr. Daniel R. Tengelsen
Bose Corporation
Framingham, Massachusetts
www.bose.com

The impedance tube has long been used as an acoustical parameter-extraction device due to the fact that, under certain assumptions, it can be modelled using a one-dimensional wave equation. Since the 1980’s, several techniques have been proposed in the literature to use this device to obtain values for the acoustic properties of various materials. However, most of the methods proposed in the literature fail to pose the problem in a statistically-robust manner. Thus, extracted parameters may vary highly from sample to sample, depending on the material under test. In this talk, we reframe one of the more common extraction methods as an optimization problem and show that more stable parameters are obtained.