The effect of a change in direction of resultant force on sound localization: the audiogravic illusion.

Graybiel, Ashton; Niven, Jorma I.

doi:10.1037/h0059186

Cited by 52 publications

(21 citation statements)

References 3 publications

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“…There are documented interactions between vestibular input and auditory spatial perception, such as the “audiogyral illusion” (Clark and Graybiel, 1949; Lester and Morant, 1970): when listeners are seated in a rotating room, their spatial auditory localization is shifted in the opposite direction from the rotation of the room. A related phenomenon, known as the “audiogravic illusion” (Graybiel and Niven, 1951), demonstrates that linear acceleration affects sound localization by shifting the perceived location of signals opposite to the acceleration of the listener. These studies provide evidence that physical motion can cause spatial auditory displacement.…”

Section: Discussionmentioning

confidence: 99%

The moving minimum audible angle is smaller during self motion than during source motion

Brimijoin

Akeroyd

2014

Front. Neurosci.

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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 stable objects. This argues that the auditory system—in a manner not unlike the vestibulo-ocular reflex—works to compensate for self motion and stabilize our sensory representation of the world. We tested a prediction arising from this postulate: that self motion should be processed more accurately than source motion. We used an infrared motion tracking system to measure head angle, and real-time interpolation of head related impulse responses to create “head-stabilized” signals that appeared to remain fixed in space as the head turned. After being presented with pairs of simultaneous signals consisting of a man and a woman speaking a snippet of speech, normal and hearing impaired listeners were asked to report whether the female voice was to the left or the right of the male voice. In this way we measured the moving minimum audible angle (MMAA). This measurement was made while listeners were asked to turn their heads back and forth between ± 15° and the signals were stabilized in space. After this “self-motion” condition we measured MMAA in a second “source-motion” condition when listeners remained still and the virtual locations of the signals were moved using the trajectories from the first condition. For both normal and hearing impaired listeners, we found that the MMAA for signals moving relative to the head was ~1–2° smaller when the movement was the result of self motion than when it was the result of source motion, even though the motion with respect to the head was identical. These results as well as the results of past experiments suggest that spatial processing involves an ongoing and highly accurate comparison of spatial acoustic cues with self-motion cues.

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Section: Discussionmentioning

confidence: 99%

The moving minimum audible angle is smaller during self motion than during source motion

Brimijoin

Akeroyd

2014

Front. Neurosci.

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“…In addition to the information originating in the semicircular-canal system, sensory information from the macular receptors of the otolith system (utricle and saccule) also plays a role in this respect. Graybiel and Niven (1951) used a centrifuge (a slowly rotating room) to show that the perceived direction of a sound source shifted in the direction of the resultant linear gravitoinertial force (see also DiZio et al, 2001; Lackner and DiZio, 2010). Body tilts, or changes in body position relative to gravity, also systematically affect auditory localization (Teuber and Liebert, 1956; Lackner, 1973; Lewald and Karnath, 2002).…”

Section: Introductionmentioning

confidence: 99%

Distortion of auditory space during visually induced self-motion in depth

et al. 2014

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Perception of self-motion is based on the integration of multiple sensory inputs, in particular from the vestibular and visual systems. Our previous study demonstrated that vestibular linear acceleration information distorted auditory space perception (Teramoto et al., 2012). However, it is unclear whether this phenomenon is contingent on vestibular signals or whether it can be caused by inputs from other sensory modalities involved in self-motion perception. Here, we investigated whether visual linear self-motion information can also alter auditory space perception. Large-field visual motion was presented to induce self-motion perception with constant accelerations (Experiment 1) and a constant velocity (Experiment 2) either in a forward or backward direction. During participants' experience of self-motion, a short noise burst was delivered from one of the loudspeakers aligned parallel to the motion direction along a wall to the left of the listener. Participants indicated from which direction the sound was presented, forward or backward, relative to their coronal (i.e., frontal) plane. Results showed that the sound position aligned with the subjective coronal plane (SCP) was significantly displaced in the direction of self-motion, especially in the backward self-motion condition as compared with a no motion condition. These results suggest that self-motion information, irrespective of its origin, is crucial for auditory space perception.

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“…Stimulation of the otoliths by linear acceleration in a centrifuge (Graybiel and Niven 1951; Dizio et al 2001) or by passive whole-body roll (Lewald and Karnath 2002) also affects sound lateralisation: sounds at straight ahead shift a small amount towards the (perceived) upper ear (audiogravic illusion). In the head-centred zenith task, we did not observe this effect (Fig.…”

Section: Discussionmentioning

confidence: 99%

The effect of head roll on perceived auditory zenith

et al. 2011

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We studied the influence of static head roll on the perceived auditory zenith in head-centred and world-centred coordinates. Subjects sat either upright, or with their head left/right rolled sideways by about 35° relative to gravity, whilst judging whether a broadband sound was heard left or right from the head-centred or world-centred zenith. When upright, these reference frames coincide. Results show that subjects judged the zenith accurately within different planes, although response variability increased for the midsagittal plane. With the head rolled, head-centred auditory zenith shifted by the same amount and was located as accurately as for upright, indicating unaltered localisation cues by head-on-body roll. Interestingly, when judging world-centred zenith subjects made large systematic errors (10–15°) in the direction of head roll, and response variability increased, which resembles the visual Aubert effect. These results demonstrate a significant influence of the vestibular-collic system on auditory spatial awareness, which sheds new light on the mechanisms underlying multisensory integration and spatial updating in sound localisation behaviour.

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The effect of a change in direction of resultant force on sound localization: the audiogravic illusion.

Cited by 52 publications

References 3 publications

The moving minimum audible angle is smaller during self motion than during source motion

The moving minimum audible angle is smaller during self motion than during source motion

Distortion of auditory space during visually induced self-motion in depth

The effect of head roll on perceived auditory zenith

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