A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones

Francesco Bigoni, Finn T. Agerkvist, Eddy Bøgh

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

This paper presents an extension of the standing-wave model of interference tubes for microphones by Ono et al. The original model accounts for three acoustic parameters: tube length, tube radius, and constant acoustic conductance per unit length. Our extension allows a varying conductance per unit length along the side wall. The assumptions behind the extended model and its ability to predict the frequency response of interference tubes are validated through simulations and by fitting the model parameters to frequency response measurements of a tube with varying conductance per unit length, using two different mountings. Results suggest that a tube with varying conductance per unit length is most effective at attenuating the off-axis sound if the conductance per unit length is decreased towards the tail end of the tube.
Original languageEnglish
Title of host publicationProceedings of 145th Audio Engineering Society Convention
PublisherAudio Engineering Society
Publication date2018
Article number10094
Publication statusPublished - 2018
Event145th International Pro Audio Convention - Jacob K. Javits Convention Center, New York, United States
Duration: 17 Oct 201820 Oct 2018
http://www.aes.org/events/145/

Conference

Conference145th International Pro Audio Convention
LocationJacob K. Javits Convention Center
CountryUnited States
CityNew York
Period17/10/201820/10/2018
Internet address

Cite this

Bigoni, F., Agerkvist, F. T., & Bøgh, E. (2018). A Stepped Acoustic Transmission Line Model of Interference Tubes for Microphones. In Proceedings of 145th Audio Engineering Society Convention [10094] Audio Engineering Society.