The directivity index is often used to represent the performance of beamforming algorithms on hearing aids. For binaural listening modeling, we also need to measure the directivity patterns. The common method to estimate the directivity patterns is using a single rotating sound source. With this method, it is difficult to obtain a good directivity pattern when the performance of the system dependents on the acoustic environment in an adaptive manner. The directivity pattern can be also confounded by other signal processing components. These processing include direction of arrival (DOA) based nonlinear post filtering. This paper proposes a method to extract the directivity patterns of a beamforming algorithm under diffuse noise conditions with a rotating probe signal. We are able to obtain the directivity pattern from the probe signal by spectral subtraction of diffuse noise sound field in a non-intrusive manner.

Authors: Ma, Changxue; Dittberner, Andrew B.; de Vries, Rob
Affiliations: GN Resound Inc., Glenview, IL, USA; GN Resound Inc., Eindhoven, The Netherlands(See document for exact affiliation information.)
AES Convention: 143 (October 2017) Paper Number: 9833
Publication Date: October 8, 2017
Subject: Perception—Part 1

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.