Search results for "Interaural time difference"

showing 3 items of 3 documents

Binaural release from masking in forward-masked intensity discrimination: Evidence for effects of selective attention

2012

In a forward-masked intensity discrimination task, we manipulated the perceived lateralization of the masker via variation of the interaural time difference (ITD). The maskers and targets were 500 Hz pure tones with a duration of 30 ms. Standards of 30 and 60 dB SPL were combined with 60 or 90 dB SPL maskers. As expected, the presentation of a forward masker perceived as lateralized to the other side of the head as the target resulted in a significantly smaller elevation of the intensity difference limen than a masker lateralized ipsilaterally. This binaural release from masking in forward-masked intensity discrimination cannot be explained by peripheral mechanisms because varying the ITD l…

AdultMaleMasking (art)medicine.medical_specialtySpeech recognitionInteraural time differenceMonauralAudiologybehavioral disciplines and activitiesLateralization of brain functionIntensity discriminationYoung AdultDiscrimination PsychologicalmedicineHumansAttentionSound LocalizationSelective attentionAuditory ThresholdSensory SystemsIntensity (physics)Acoustic StimulationAuditory PerceptionFemalePsychologyPerceptual MaskingBinaural recordingpsychological phenomena and processesPsychoacousticsHearing Research
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2014

Nonsimultaneous maskers can strongly impair performance in an auditory intensity discrimination task. Using methods of molecular psychophysics, we quantified the extent to which (1) a masker-induced impairment of the representation of target intensity (i.e., increase in internal noise) and (2) a systematic influence of the masker intensities on the decision variable contribute to these effects. In a two-interval intensity discrimination procedure, targets were presented in quiet, and combined with forward maskers. The lateralization of the maskers relative to the targets was varied via the interaural time difference. Intensity difference limens (DLs) were strongly elevated under forward mas…

medicine.medical_specialtyMultidisciplinarymedia_common.quotation_subjectPerceptual MaskingInteraural time differenceAudiologybehavioral disciplines and activitiesLateralization of brain functionIntensity (physics)QUIETPerceptionPsychophysicsmedicinePsychoacousticspsychological phenomena and processesMathematicsmedia_commonPLOS ONE
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Soundscape design through evolutionary engines

2008

Abstract Two implementations of an Evolutionary Sound Synthesis method using the Interaural Time Difference (ITD) and psychoacoustic descriptors are presented here as a way to develop criteria for fitness evaluation. We also explore a relationship between adaptive sound evolution and three soundscape characteristics: keysounds, key-signals and sound-marks. Sonic Localization Field is defined using a sound attenuation factor and ITD azimuth angle, respectively (Ii, Li). These pairs are used to build Spatial Sound Genotypes (SSG) and they are extracted from a waveform population set. An explanation on how our model was initially written in MATLAB is followed by a recent Pure Data (Pd) impleme…

sonic spatializationeducation.field_of_studySoundscapesound synthesisGeneral Computer Scienceartificial evolutionComputer scienceSpeech recognitionacoustic descriptorsPopulationEvolutionary algorithmInteraural time differencegenetic algorithmsPure DataPsychoacousticseducationcomputerAcoustic attenuationParametric statisticscomputer.programming_languageComputer Science(all)
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