Research Repository

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Real-time estimation of horizontal gaze angle by saccade integration using in-ear electrooculography (2018)
Journal Article
Hládek, Ľ., Porr, B., & Brimijoin, W. O. (2018). Real-time estimation of horizontal gaze angle by saccade integration using in-ear electrooculography. PLoS ONE, 13(1), doi:10.1371/journal.pone.0190420. ISSN 1932-6203

The manuscript proposes and evaluates a real-time algorithm for estimating eye gaze angle based solely on single-channel electrooculography (EOG), which can be obtained directly from the ear canal using conductive ear moulds. In contrast to conventio... Read More

The minimum monitoring signal-to-noise ratio for off-axis signals and its implications for directional hearing aids (2017)
Journal Article
Archer-Boyd, A. W., Holman, J. A., & Brimijoin, W. O. (2018). The minimum monitoring signal-to-noise ratio for off-axis signals and its implications for directional hearing aids. Hearing Research, 357, (64-72). doi:10.1016/j.heares.2017.11.011. ISSN 0378-5955

The signal-to-noise ratio (SNR) benefit of hearing aid directional microphones is dependent on the angle of the listener relative to the target, something that can change drastically and dynamically in a typical group conversation. When a new target... Read More

Influence of microphone housing on the directional response of piezoelectric MEMS microphones inspired by Ormia ochracea (2017)
Journal Article
Bauer, R., Zhang, Y., Jackson, J. C., Whitmer, W. M., Brimijoin, W. O., Akeroyd, M. A., …Windmill, J. F. (in press). Influence of microphone housing on the directional response of piezoelectric MEMS microphones inspired by Ormia ochracea. IEEE Sensors Journal, ISSN 1530-437X

The influence of custom microphone housings on the acoustic directionality and frequency response of a multi-band bio-inspired MEMS microphone is presented. The 3.2mm by 1.7mm piezoelectric MEMS microphone, fabricated by a cost-effective multi-user p... Read More

Egocentric and allocentric representations in auditory cortex (2017)
Journal Article
Town, S. M., Brimijoin, W. O., & Bizley, J. K. (in press). Egocentric and allocentric representations in auditory cortex. PLoS Biology, 15(6), doi:10.1371/journal.pbio.2001878. ISSN 1544-9173

A key function of the brain is to provide a stable representation of an object’s location in the world. In hearing, sound azimuth and elevation are encoded by neurons throughout the auditory system, and auditory cortex is necessary for sound localiza... Read More

Auditory compensation for head rotation is incomplete (2016)
Journal Article
Freeman, T., Culling, J., Akeroyd, M. A., & Brimijoin, W. O. (in press). Auditory compensation for head rotation is incomplete. Journal of Experimental Psychology: Human Perception and Performance, 43(2), doi:10.1037/xhp0000321. ISSN 0096-1523

Hearing is confronted by a similar problem to vision when the observer moves. The image motion that is created remains ambiguous until the observer knows the velocity of eye and/or head. One way the visual system solves this problem is to use motor c... Read More

The effects of hearing impairment, age, and hearing aids on the use of self motion for determining front/back location (2016)
Journal Article
Brimijoin, W. O., & Akeroyd, M. A. (2016). The effects of hearing impairment, age, and hearing aids on the use of self motion for determining front/back location. Journal of the American Academy of Audiology, 27(7), doi:10.3766/jaaa.15101. ISSN 1050-0545

Background: There are two cues that listeners use to disambiguate the front/back location of a sound source: high-frequency spectral cues associated with the head and pinnae, and self-motion‐related binaural cues. The use of these cues can be comp... Read More

Biomimetic direction of arrival estimation for resolving front-back confusions in hearing aids (2015)
Journal Article
Archer-Boyd, A. W., Whitmer, W. M., Brimijoin, W. O., & Soraghan, J. J. (2015). Biomimetic direction of arrival estimation for resolving front-back confusions in hearing aids. Journal of the Acoustical Society of America, 137(5), doi:10.1121/1.4918297

Sound sources at the same angle in front or behind a two-microphone array (e.g., bilateral hearing aids) produce the same time delay and two estimates for the direction of arrival: A front-back confusion. The auditory system can resolve this issue us... Read More

The moving minimum audible angle is smaller during self motion than during source motion (2014)
Journal Article
Brimijoin, W. O., & Akeroyd, M. A. (2014). The moving minimum audible angle is smaller during self motion than during source motion. Frontiers in Neuroscience, 8, doi:10.3389/fnins.2014.00273. ISSN 1662-4548

We are rarely perfectly still: our heads rotate in three axes and move in three dimensions, constantly varying the spectral and binaural cues at the ear drums. In spite of this motion, static sound sources in the world are typically perceived as stab... Read More

The effect of hearing aid microphone mode on performance in an auditory orienting task (2014)
Journal Article
Brimijoin, W. O., Whitmer, W. M., McShefferty, D., & Akeroyd, M. A. (2014). The effect of hearing aid microphone mode on performance in an auditory orienting task. Ear and Hearing, 35(5), doi:10.1097/AUD.0000000000000053. ISSN 0196-0202

OBJECTIVES: Although directional microphones on a hearing aid provide a signal-to-noise ratio benefit in a noisy background, the amount of benefit is dependent on how close the signal of interest is to the front of the user. It is assumed that whe... Read More