An experimental investigation into a dual taper acoustic black hole termination

Author:

Hook K.1,Cheer J.1ORCID,Karlos A.2

Affiliation:

1. Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom

2. Department of Robotics and Mechatronics, AGH University of Science and Technology, Al. A. Mickiewicza 30, Krakow, 30-059, Poland, ,

Abstract

Acoustic black holes (ABHs) can provide effective damping of the reflected wave component when used to terminate a beam. The behaviour of an ABH is characterised by its local modes, which produce narrow frequency bands of high absorption. To enhance the performance of ABH terminations, a multi-taper ABH has previously been proposed and analytical results demonstrate that the use of two or more tapers produces a compound effect on the reflection coefficient, resulting in more bands of low reflection. This paper extends this work and presents an experimental realisation of a multi-taper ABH confirming the previous analytical results.

Funder

Engineering and Physical Sciences Research Council

National Center of Competence in Research Affective Sciences - Emotions in Individual Behaviour and Social Processes

Publisher

Acoustical Society of America (ASA)

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics

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