A psychophysiological study of auditory illusions of approach and withdrawal in the context of the perceptual environment.

Auditory perception of the depth of space is based mainly on spectral and amplitude changes of sound waves originating from the sound source and reaching the listener. The perceptive illusion of movement of an auditory image caused by changes in amplitude and/or frequency of the signal tone emanating from an immobile loudspeaker was studied. Analysis of data obtained from the participants revealed the diapason of combinations of amplitude and frequency changes for which the movement direction was perceived similarly by all participants, despite significantly different movement assessment criteria. Additional auditory and visual information of the conditions of radial movement (near or far fields) determined listeners' interpretation of changes in the signal parameters. The data obtained about the perception of approach and withdrawal models are evidence of the fact that the principal cues of the perception of the distance of immobile sound sources manifests similarly to that of an auditory image moving along a radial axis.

A psychophysiological study of auditory illusions of approach and withdrawal in the context of the perceptual environment

Auditory perception of the depth of space is based mainly on spectral and amplitude changes of sound waves originating from the sound source and reaching the listener. The perceptive illusion of movement of an auditory image caused by changes in amplitude and/or frequency of the signal tone emanating from an immobile loudspeaker was studied. Analysis of data obtained from the participants revealed the diapason of combinations of amplitude and frequency changes for which the movement direction was perceived similarly by all participants, despite significantly different movement assessment criteria. Additional auditory and visual information of the conditions of radial movement (near or far fields) determined listeners’ interpretation of changes in the signal parameters. The data obtained about the perception of approach and withdrawal models are evidence of the fact that the principal cues of the perception of the distance of immobile sound sources manifests similarly to that of an auditory image moving along a radial axis (AU)

La percepción auditiva de la profundidad del espacio se basa principalmente en los cambios de espectro y amplitud de las ondas de sonido que originan desde la fuente del sonido y alcanzan al escuchador. Se estudió la ilusión perceptiva del movimiento de una imagen auditiva causada por los cambios en la amplitud y/o la frecuencia del tono de señal que emana desde un altavoz inmóvil. Análisis de los datos obtenidos de los participantes reveló el diapasón de combinaciones de las modulaciones de amplitud y frecuencia para las cuales el vector de movimiento se percibió de la misma forma por todos los participantes, a pesar de criterios de evaluación del movimiento significativamente diferentes. Información adicional auditiva y visual de las condiciones de movimiento radial (campos cercanos o lejanos) determinó la interpretación de los cambios en los parámetros de la señal por parte de los escuchadores. Los datos obtenidos acerca de la percepción de los modelos de acercamiento y retirada son evidencia del hecho de que los rasgos principales de la percepción de la distancia de fuentes de sonido inmóviles se manifiesta de forma similar a la de una imagen auditiva que se mueve a lo largo de un eje radia (AU)