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  • 1
    Online Resource
    Online Resource
    Binaural detection with reproducible short-duration narrow-band maskers
    Acoustical Society of America (ASA) ; 1989
    In:  The Journal of the Acoustical Society of America Vol. 86, No. S1 ( 1989-11-01), p. S12-S12
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 86, No. S1 ( 1989-11-01), p. S12-S12
    Abstract: Hit and false alarm rates were measured for detection of a 500-Hz tone target in each often samples of 1/3-oct noise centered at 500 Hz with a duration of 10 ms, for both NoSπ and NoSo conditions. Two target waveforms were used, differing only in their phase relative to the masker. Three subjects are being tested, but extensive data is available from only one subject so far. Also, the NoSo experiment has been done for only one target phase. The NoSo hit rates correlate very well with the energies in the waveforms. For NoSπ, the effect of target phase on hit rate is substantial, with almost no correlation between the rates for the two target phases. This is very different from earlier results with long duration waveforms [e,g., Gilkey et al., J. Acoust. Soc. Am. 78, 1207–1219 (1985)]. Neither models based on lateral position nor models based on the sum of the squares of the interaural differences correlate well with the data. Since subjects report multiple images and the interaural differences sometimes change substantially over the 10-ms duration, models that process the first and second halves of the waveforms are analyzed separately. [Work suported by NINCDS.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.2027375
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1989
    detail.hit.zdb_id: 1461063-2
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  • 2
    Online Resource
    Online Resource
    Intrinsic oscillations in spike trains indicate non-renewal statistics due to convergence of inputs in dorsal cochlear nucleus neurons
    Elsevier BV ; 2005
    In:  Hearing Research Vol. 200, No. 1-2 ( 2005-2), p. 10-28
    Details
    In: Hearing Research, Elsevier BV, Vol. 200, No. 1-2 ( 2005-2), p. 10-28
    Type of Medium: Online Resource
    ISSN: 0378-5955
    URL: Article
    DOI: 10.1016/j.heares.2004.08.010
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2005
    detail.hit.zdb_id: 2006374-X
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    Binaural detection with narrowband and wideband reproducible noise maskers: I. Results for human
    Acoustical Society of America (ASA) ; 2002
    In:  The Journal of the Acoustical Society of America Vol. 111, No. 1 ( 2002-01-01), p. 336-345
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 111, No. 1 ( 2002-01-01), p. 336-345
    Abstract: This study investigated binaural detection of tonal targets (500 Hz) using sets of individual masker waveforms with two different bandwidths. Previous studies of binaural detection with wideband noise maskers show that responses to individual noise waveforms are correlated between diotic (N0S0) and dichotic (N0Sπ) conditions [Gilkey et al., J. Acoust. Soc. Am. 78, 1207–1219 (1985)]; however, results for narrowband maskers are not correlated across interaural configurations [Isabelle and Colburn, J. Acoust. Soc. Am. 89, 352–359 (1991)] . This study was designed to allow direct comparison, in detail, of responses across bandwidths and interaural configurations. Subjects were tested on a binaural detection task using both narrowband (100-Hz bandwidth) and wideband (100 Hz to 3 kHz) noise maskers that had identical spectral components in the 100-Hz frequency band surrounding the tone frequency. The results of this study were consistent with the previous studies: N0S0 and N0Sπ responses were more strongly correlated for wideband maskers than for narrowband maskers. Differences in the results for these two bandwidths suggest that binaural detection is not determined solely by the masker spectrum within the critical band centered on the target frequency, but rather that remote frequencies must be included in the analysis and modeling of binaural detection with wideband maskers. Results across the set of individual noises obtained with the fixed-level testing were comparable to those obtained with a tracking procedure which was similar to the procedure used in a companion study of rabbit subjects [Zheng et al., J. Acoust. Soc. Am. 111, 346–356 (2002)].
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.1423929
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2002
    detail.hit.zdb_id: 1461063-2
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  • 4
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    An evaluation of models for diotic and dichotic detection in reproducible noises
    Acoustical Society of America (ASA) ; 2009
    In:  The Journal of the Acoustical Society of America Vol. 126, No. 4 ( 2009-10-01), p. 1906-1925
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 126, No. 4 ( 2009-10-01), p. 1906-1925
    Abstract: Several psychophysical models for masked detection were evaluated using reproducible noises. The data were hit and false-alarm rates from three psychophysical studies of detection of 500-Hz tones in reproducible noise under diotic (N0S0) and dichotic (N0Sπ) conditions with four stimulus bandwidths (50, 100, 115, and 2900 Hz). Diotic data were best predicted by an energy-based multiple-detector model that linearly combined stimulus energies at the outputs of several critical-band filters. The tone-plus-noise trials in the dichotic data were best predicted by models that linearly combined either the average values or the standard deviations of interaural time and level differences; however, these models offered no predictions for noise-alone responses. The decision variables of more complicated temporal models, including the models of Dau et al. [(1996a). J. Acoust. Soc. Am. 99, 3615–3622] and Breebaart et al. [(2001a). J. Acoust. Soc. Am. 110, 1074–1088] , were weakly correlated with subjects’ responses. Comparisons of the dependencies of each model on envelope and fine-structure cues to those in the data suggested that dependence upon both envelope and fine structure, as well as an interaction between them, is required to predict the detection results.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3206583
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2009
    detail.hit.zdb_id: 1461063-2
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  • 5
    Online Resource
    Online Resource
    Binaural detection with narrowband and wideband reproducible noise maskers. III. Monaural and diotic detection and model results
    Acoustical Society of America (ASA) ; 2006
    In:  The Journal of the Acoustical Society of America Vol. 119, No. 4 ( 2006-04-01), p. 2258-2275
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 119, No. 4 ( 2006-04-01), p. 2258-2275
    Abstract: A single-interval, yes-no, tone-in-noise detection experiment was conducted to measure the proportion of “tone present” responses to each of 25 reproducible noise-alone and tone-plus-noise waveforms under narrowband (100Hz), wideband (2900Hz), monotic, and diotic stimulus conditions. Proportions of “tone present” responses (estimates of the probabilities of hits and false alarms) were correlated across masker bandwidths and across monotic and diotic conditions. Two categories of models were considered; one based on stimulus energy or neural counts, and another based on temporal structure of the stimulus envelope or neural patterns. Both categories gave significant correlation between decision variables and data. A model based on a weighted combination of energy in multiple critical bands performed best, predicting up to 90% of the variance in the reproducible-noise data. However, since energy-based models are unable to successfully explain detection under a roving-level paradigm without substantial modification, it is argued that other variations of detection models must be considered for future study. Temporal models are resistant to changes in threshold under roving-level conditions, but explained at most only 67% of the variance in the reproducible-noise data.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.2177583
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2006
    detail.hit.zdb_id: 1461063-2
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  • 6
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    The contribution of envelope and carrier to cues for tone-in-noise detection in narrow-band reproducible noises
    Acoustical Society of America (ASA) ; 2006
    In:  The Journal of the Acoustical Society of America Vol. 119, No. 5_Supplement ( 2006-05-01), p. 3233-3233
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 119, No. 5_Supplement ( 2006-05-01), p. 3233-3233
    Abstract: To elucidate the roles of envelope and carrier cues in detection of a 500-Hz tone in 50-Hz bandwidth noise under N0Sπ conditions, hit- and false-alarm rates were collected for 4 sets of reproducible stimuli. The envelopes and carriers from two sets of stimuli (each with 25 signal-plus-noise and 25 noise-alone waveforms) were extracted and recombined to form 2 new sets (each having the carriers from one of the original sets and the envelopes from the other). Noises were preselected to produce minimal spectral splatter in the recombination processes. Preliminary results for signal-plus-noise trials suggest that carrier cues (e.g., temporal fine structure) are dominant over envelope cues (i.e., response patterns were more similar between sets with the same carriers but different envelopes, than between sets with the same envelopes but different carriers); however, carrier cues cannot completely explain the data. Results for noise-alone trials suggest that both envelope cues and carrier cues contribute to listener responses. Further analyses will explore potential interactions between monaural and binaural stimulus properties, as well as interactions between interaural envelope cues and carrier cues. [Supported by NIH DC007798(SAD), DC001641(LHC), and DC00100(HSC).]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4808903
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2006
    detail.hit.zdb_id: 1461063-2
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  • 7
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    Online Resource
    Diotic and dichotic detection with reproducible chimeric stimuli
    Acoustical Society of America (ASA) ; 2009
    In:  The Journal of the Acoustical Society of America Vol. 126, No. 4 ( 2009-10-01), p. 1889-1905
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 126, No. 4 ( 2009-10-01), p. 1889-1905
    Abstract: Subject responses were measured for individual narrow-band reproducible stimuli in a low-frequency tone-in-noise detection task. Both N0S0 and N0Sπ conditions were examined. The goal of the experiment was to determine the relative importance of envelope and fine-structure cues. Therefore, chimeric stimuli were generated by recombining envelopes and fine structures from different reproducible stimuli. Detection judgments for noise-alone or tone-plus-noise stimuli that had common envelopes but different fine structures or common fine structures but different envelopes were compared. The results showed similar patterns of responses to stimuli that shared envelopes, indicating the importance of envelope cues; however, fine-structure cues were also shown to be important. The relative weight assigned to envelope and fine-structure cues varied across subjects and across interaural conditions. The results also indicated that envelope and fine-structure information are not processed independently. Implications for monaural and binaural models of masking are discussed.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3203996
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2009
    detail.hit.zdb_id: 1461063-2
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  • 8
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    Online Resource
    An analysis of the effect of masker level on critical bandwidth
    Acoustical Society of America (ASA) ; 1978
    In:  The Journal of the Acoustical Society of America Vol. 63, No. S1 ( 1978-05-01), p. S30-S30
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 63, No. S1 ( 1978-05-01), p. S30-S30
    Abstract: A simple mathematical model of auditory nerve activity was used to evaluate the increase in critical bandwidth with masker intensity suggested by psychophysical detection experiments. Given the masker spectrum, the model allows calculation of the excitation areas [i.e., the ranges of characteristic (best) frequencies of excited auditory nerve fibers] as a function of intensity. The results of a recent study of detection thresholds for a tone centered in the gap of a notched noise masker [D. L. Weber, J. Acoust. Soc. Am. 62, 124–129 (1977)] were analyzed. For narrow notch widths, the excitation areas completely overlap in the notch region at all intensities. The masking effect is then essentially the same as for a single wide-band masker, and is characterized by a constant signal-to-noise ratio as a function of masker level. At wider notch widths, the excitation areas are separated by a gap that is inversely proportional to masker intensity. This leads to a nonlinear increase in detection threshold with masker intensity. The model thus predicts Weber's findings and supports the contention that critical bandwidth increases with masker intensity. [Work supported by NIH.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.2016592
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1978
    detail.hit.zdb_id: 1461063-2
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  • 9
    Online Resource
    Online Resource
    Model simulations of masked thresholds for tones in dichotic noise maskers
    Acoustical Society of America (ASA) ; 1995
    In:  The Journal of the Acoustical Society of America Vol. 97, No. 5_Supplement ( 1995-05-01), p. 3411-3412
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 97, No. 5_Supplement ( 1995-05-01), p. 3411-3412
    Abstract: The study of masked thresholds in dichotic noise maskers is important for understanding the processing in binaural hearing. To simulate these thresholds a psychoacoustically motivated perception model was used [T. Dau et al. (1995). ‘‘A quantitative model of the ‘‘effective’’ signal processing in the auditory system: I. Model structure,’’ submitted to J. Acoust. Soc. Am.]. This model, which has been successfully applied to several monaural psychoacoustical experiments, was extended by an additional binaural processing unit. It consists of a filterbank, half-wave rectifier, low-pass filter, and adaptation loops, which model the temporal processing. The binaural processing unit detects the interaural correlation and makes decisions based on the difference between the signals from both ears. Masked thresholds in the NoSπ and NπSo configurations, obtained as a function of noise masker frequency and bandwidth, were simulated and compared to new experimental measurements. The dependence on interaural delay and interaural decorrelation of the noise masker was also modeled and compared to data in the literature. In general, model simulations agree well with the main features seen in the measurements. [Work supported by DFG (Ho 1627/1-1) and by NIDCD (Grant DC00100).]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.412493
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1995
    detail.hit.zdb_id: 1461063-2
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  • 10
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    Online Resource
    A model for binaural response properties of inferior colliculus neurons. I. A model with interaural time difference-sensitive excitatory and inhibitory inputs
    Acoustical Society of America (ASA) ; 1998
    In:  The Journal of the Acoustical Society of America Vol. 103, No. 1 ( 1998-01-01), p. 475-493
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 1 ( 1998-01-01), p. 475-493
    Abstract: A model was developed that simulates the binaural response properties of low-frequency inferior colliculus (IC) neurons in response to several types of stimuli. The model incorporates existing models for auditory-nerve fibers, bushy cells in the cochlear nucleus, and cells in medial superior olive (MSO). The IC model neuron receives two inputs, one excitatory from an ipsilateral MSO model cell and one inhibitory from a contralateral MSO model cell. The membrane potential of the IC model neuron (and the other model neurons) is described by Hodgkin–Huxley type equations. Responses of IC neurons are simulated for pure-tone stimuli, binaural beat stimuli, interaural phase-modulated tones, single binaural clicks, and pairs of binaural clicks. The simulation results show most of the observed properties of IC discharge patterns, including the bimodal and unimodal interaural time difference (ITD) functions, sensitivities to direction and rate of change of ITD, ITD-dependent echo suppression, and early and late inhibitions in response to clicks. This study demonstrates that these response properties can be generated by a simple model incorporating ITD-dependent excitation and inhibition from binaural neurons.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.421100
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1998
    detail.hit.zdb_id: 1461063-2
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