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The role of acoustic cues in time-to-passage judgments : judging time-to-passag...
Silva, Rosa Mariana Macedo Tinoco da; Mouta, Sandra; Mendonça, Catarina; Silva, Carlos César Loureiro; Lamas, João; Santos, Jorge A.8º Encontro Nacional da Associação Portuguesa de Psicologia Experimental : posters : títulos e resumos ; Estimating the arrival of a moving sound is part of everyday tasks, such as when crossing a street with cars coming from both sides. Previous studies showed that approaching sounds were evaluated as closer than the real final distance, in comparison with corresponding receding sounds (Neuhoff; 2001). Thi...
The role of acoustic cues in time-to-passage judgments : judging time-to-pa...
Silva, Rosa Mariana Macedo Tinoco da; Mouta, Sandra; Mendonça, Catarina; Lamas, João; Silva, Carlos César Loureiro; Santos, Jorge A.5th Iberian Conference on Perception (CIP) ; Estimating the arrival of a moving sound is part of people’s everyday tasks, such as when crossing a street with cars coming from both sides (eg. Winer, 1980 in Rosenblum, Wuestefeld, Saldaña, 1993). Given equal distances, the beginning and ending positions of a moving sound’s source are perceived as closer when movin...
Learning auditory space : generalization and long-term effects
Mendonça, Catarina; Campos, Guilherme; Dias, Paulo; Santos, Jorge A.Background: Previous findings have shown that humans can learn to localize with altered auditory space cues. Here we analyze such learning processes and their effects up to one month on both localization accuracy and sound externalization. Subjects were trained and retested, focusing on the effects of stimulus type in learning, stimulus type in localization, stimulus position, previous experience, externalizati...
Learning auditory space : generalization and long-term effects
Mendonça, Catarina; Campos, Guilherme; Dias, Paulo; Santos, Jorge A.Background Previous findings have shown that humans can learn to localize with altered auditory space cues. Here we analyze such learning processes and their effects up to one month on both localization accuracy and sound externalization. Subjects were trained and retested, focusing on the effects of stimulus type in learning, stimulus type in localization, stimulus position, previous experience, externalizati...
Depth cues and perceived audiovisual synchrony of biological motion
Silva, Carlos; Mendonça, Catarina; Mouta, Sandra; Silva, Rosa; Campos, J. Creissac; Santos, Jorge A.Due to their different propagation times, visual and auditory signals from external events arrive at the human sensory receptors with a disparate delay. This delay consistently varies with distance, but, despite such variability, most events are perceived as synchronic. There is, however, contradictory data and claims regarding the existence of compensatory mechanisms for distance in simultaneity judgments. Pr...
Traffic noise abatement : how different pavements, vehicle speeds and traffic den...
Freitas, Elisabete F.; Mendonça, Catarina; Santos, Jorge A.; Murteira, Carla; Ferreira, JoãoIn this paper, annoyance ratings from traffic noise recorded on cobblestones, dense asphalt, and open asphalt rubber pavements are assessed with regard to car speeds and traffic den- sities. It was found that cobblestones pavements are the most annoying; also while open asphalt rubber pavement imposes less annoyance than dense asphalt it is not significantly different. Higher car speeds always lead to greater ...
Real-time auralisation system for virtual microphone positioning
Barker, Tom; Campos, Guilherme; Dias, Paulo; Vieira, José; Mendonça, Catarina; Santos, Jorge A.A computer application was developed to simulate the process of microphone positioning in sound recording applications. A dense, regular grid of impulse responses pre-recorded on the region of the room under study allowed the sound captured by a virtual mi- crophone to be auralised through real-time convolution with an anechoic stream representing the sound source. Convolution was performed using a block-based ...
On the improvement of localization accuracy with nonindividualized HRTF-based s...
Mendonça, Catarina; Campos, Guilherme; Dias, Paulo; Vieira, José; Ferreira, João P.; Santos, Jorge A.Auralization is a powerful tool to increase the realism and sense of immersion in Virtual Reality environments. The Head Related Transfer Function (HRTF) filters commonly used for auralization are non-individualized, as obtaining individualized HRTFs poses very serious practical difficulties. It is therefore extremely important to understand to what extent this hinders sound perception. In this paper, we add...
The benefit of multisensory integration with biological motion signals
Mendonça, Catarina; Santos, Jorge A.; López-Moliner, JoanAssessing intentions, direction, and velocity of others is necessary for most daily tasks, and such information is often made available by both visual and auditory motion cues. Therefore, it is not surprising our great ability to perceive human motion. Here, we explore the multisensory integration of cues of biological motion walking speed. After testing for audiovisual asynchronies (visual signals led auditory...
Motion in depth : audiovisual synchrony perception of walkers as a function of ...
Santos, Jorge A.; Silva, Carlos; Mendonça, CatarinaAudiovisual perception is still an intriguing phenomenon, especially when we think about the physical and neuronal differences underlying the perception of sound and light. Physically, there is a delay of ~3 ms/m between the emission of a sound and its arrival to the observer. On the other hand, we know that acoustic transduction is a fast process (~1ms) (Coney & Hudspeth, 1979), while phototransduction takes o...
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