| dc.contributor.author | Markotjohn, Melina E | |
| dc.date.accessioned | 2023-04-14T12:58:06Z | |
| dc.date.available | 2023-04-14T12:58:06Z | |
| dc.date.issued | 2023-04-13 | |
| dc.identifier.uri | http://hdl.handle.net/10222/82408 | |
| dc.description | Muscle activity was recorded with four electrodes affixed around the ears (behind the pinna and in posterior, anterior and superior positions) as well as on the outer canthi (to track ocular activity), and lateral neck (to track any tension in the neck) while listeners completed a spatialized listening test in which the source locations of the target speaker and competing noise were controlled experimentally in both soundfield and in a virtual auditory space. The post-auricular muscle response was shown to be reliably recorded across all participants within the study. There was a significant main effect of channel and a significant interaction between presentation mode and channel. There were no significant differences between presentation modes for any other muscle. Further, it was shown that there was no significant effect of azimuth to be found. | en_US |
| dc.description.abstract | The post-auricular muscle in many species changes the orientation of the external ears to improve hearing for biologically relevant sounds. The same muscle exists in humans and is modulated by sound, but humans cannot similarly change the direction of their ears. The objective of this current project focused on measuring the activity of the post-auricular muscle during a speech-in-noise listening task where the orientations of the speaker and the noise were controlled experimentally. This was done in order to determine how the signal-to-noise ratio of the post-auricular muscle varies as a function of presentation mode (actual sound space versus virtual auditory space) and azimuth (target speech and noise co-localized at 45 ̊ and target speech and noise spatially separated at 135 ̊ and 45 ̊, respectively. The post-auricular muscle response was shown to be reliably recorded across all participants within the study. No significant effect of azimuth was found. | en_US |
| dc.language.iso | en | en_US |
| dc.subject | hearing | en_US |
| dc.title | Post-Auricular Orientation of Auditory Attention in Sound Field versus Virtual Sound Space | en_US |
| dc.date.defence | 2023-04-03 | |
| dc.contributor.department | School of Communication Sciences and Disorders | en_US |
| dc.contributor.degree | Master of Science | en_US |
| dc.contributor.external-examiner | Dr. Greg Noel | en_US |
| dc.contributor.graduate-coordinator | Janet Ingles | en_US |
| dc.contributor.thesis-reader | Dr. Rob Adamson | en_US |
| dc.contributor.thesis-reader | Dr. Aaron Newman | en_US |
| dc.contributor.thesis-supervisor | Dr. Steven Aiken | en_US |
| dc.contributor.ethics-approval | Received | en_US |
| dc.contributor.manuscripts | No | en_US |
| dc.contributor.copyright-release | No | en_US |
