Enhancement, adaptation, and the binaural system

Šerman, Maja; Semal, Catherine; Demany, Laurent

doi:10.1121/1.2902177

Cited by 12 publications

(20 citation statements)

References 37 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the Kidd and Wright (1994) study, the shift in location of the precursor was produced by an interaural level difference (ILD) rather than an ITD. The substantial differences in stimuli and tasks-discriminating a pitch difference in an enhanced noise band (Serman et al 2008) and detection of a very brief "pure" tone embedded in a notched noise (Kidd and Wright, 1994)-are the likely cause of this apparent discrepancy, although this issue requires further examination.…”

Section: Introductionmentioning

confidence: 99%

“…One potential complication to the conclusion that higher-level auditory mechanisms (above the auditory nerve) contribute to enhancement, however, was the lack of any evidence for enhancement occurring psychophysically when the precursor was presented contralateral to the target-plusmasker (e.g., Viemeister, 1980;Carlyon, 1989;Kidd and Wright, 1994;Serman et al, 2008). If enhancement was due at least in part to mechanisms acting beyond the auditory nerve, and thus at or beyond the point where the inputs from the two ears are combined, then it might be expected that contralateral input of the precursor would provide some degree of benefit.…”

Section: Introductionmentioning

confidence: 99%

“…Serman et al (2008) conducted an experiment in which an enhancing precursor (notched-filtered noise) created the sensation of pitch in a subsequent broadband pink-noise test stimulus. The idea was that the pitch evoked in the test stimulus was related to the frequency of the notch in the precursor.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Contextual effects in the identification of nonspeech auditory patterns

Kidd

Richards

Streeter

et al. 2011

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

This study investigated the benefit of a priori cues in a masked nonspeech pattern identification experiment. Targets were narrowband sequences of tone bursts forming six easily identifiable frequency patterns selected randomly on each trial. The frequency band containing the target was randomized. Maskers were also narrowband sequences of tone bursts chosen randomly on every trial. Targets and maskers were presented monaurally in mutually exclusive frequency bands, producing large amounts of informational masking. Cuing the masker produced a significant improvement in performance, while holding the target frequency band constant provided no benefit. The cue providing the greatest benefit was a copy of the masker presented ipsilaterally before the target-plus-masker. The masker cue presented contralaterally, and a notched-noise cue produced smaller benefits. One possible mechanism underlying these findings is auditory "enhancement" in which the neural response to the target is increased relative to the masker by differential prior stimulation of the target and masker frequency regions. A second possible mechanism provides a benefit to performance by comparing the spectrotemporal correspondence of the cue and targetplus-masker and is effective for either ipsilateral or contralateral cue presentation. These effects improve identification performance by emphasizing spectral contrasts in sequences or streams of sounds.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Contextual effects in the identification of nonspeech auditory patterns

Kidd

Richards

Streeter

et al. 2011

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…Several studies have failed to find enhancement effects when the precursor was presented contralaterally to the test sound, that is, when the two sounds were presented to opposite ears (Viemeister 1980;Summerfield et al 1984;Carlyon 1989;Serman et al 2008). However, , Erviti et al (2011), andKidd et al (2011) have obtained enhancement effects for contralateral precursors.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon, known as the "enhancement" effect, occurs more generally whenever spectrally local energy is added to a sound with energy in multiple spectral bands (Summerfield et al 1987;Hartmann and Goupell 2006;Serman et al 2008;Erviti et al 2011). Enhancement is therefore helpful for the detection of changes in complex auditory environments.…”

Section: Introductionmentioning

confidence: 99%

Auditory Enhancement of Increments in Spectral Amplitude Stems from More Than One Source

Carcagno

Semal

Demany

2012

JARO

Self Cite

View full text Add to dashboard Cite

A component of a test sound consisting of simultaneous pure tones perceptually "pops out" if the test sound is preceded by a copy of itself with that component attenuated. Although this "enhancement" effect was initially thought to be purely monaural, it is also observable when the test sound and the precursor sound are presented contralaterally (i.e., to opposite ears). In experiment 1, we assessed the magnitude of ipsilateral and contralateral enhancement as a function of the time interval between the precursor and test sounds (10, 100, or 600 ms). The test sound, randomly transposed in frequency from trial to trial, was followed by a probe tone, either matched or mismatched in frequency to the test sound component which was the target of enhancement. Listeners' ability to discriminate matched probes from mismatched probes was taken as an index of enhancement magnitude. The results showed that enhancement decays more rapidly for ipsilateral than for contralateral precursors, suggesting that ipsilateral enhancement and contralateral enhancement stem from at least partly different sources. It could be hypothesized that, in experiment 1, contralateral precursors were effective only because they provided attentional cues about the target tone frequency. In experiment 2, this hypothesis was tested by presenting the probe tone before the precursor sound rather than after the test sound. Although the probe tone was then serving as a frequency cue, contralateral precursors were again found to produce enhancement. This indicates that contralateral enhancement cannot be explained by cuing alone and is a genuine sensory phenomenon.

show abstract

Is Off-Frequency Overshoot Caused by Adaptation of Suppression?

Fletcher

Boer

Krumbholz

2014

JARO

View full text Add to dashboard Cite

This study is concerned with the mechanism of off-frequency overshoot. Overshoot refers to the phenomenon whereby a brief signal presented at the onset of a masker is easier to detect when the masker is preceded by a “precursor” sound (which is often the same as the masker). Overshoot is most prominent when the masker and precursor have a different frequency than the signal (henceforth referred to as “off-frequency overshoot”). It has been suggested that off-frequency overshoot is based on a similar mechanism as “enhancement,” which refers to the perceptual pop-out of a signal after presentation of a precursor that contains a spectral notch at the signal frequency; both have been proposed to be caused by a reduction in the suppressive masking of the signal as a result of the adaptive effect of the precursor (“adaptation of suppression”). In this study, we measured overshoot, suppression, and adaptation of suppression for a 4-kHz sinusoidal signal and a 4.75-kHz sinusoidal masker and precursor, using the same set of participants. We show that, while the precursor yielded strong overshoot and the masker produced strong suppression, the precursor did not appear to cause any reduction (adaptation) of suppression. Predictions based on an established model of the cochlear input–output function indicate that our failure to obtain any adaptation of suppression is unlikely to represent a false negative outcome. Our results indicate that off-frequency overshoot and enhancement are likely caused by different mechanisms. We argue that overshoot may be due to higher-order perceptual factors such as transient masking or attentional diversion, whereas enhancement may be based on mechanisms similar to those that generate the Zwicker tone.

show abstract

Enhancement, adaptation, and the binaural system

Cited by 12 publications

References 37 publications

Contextual effects in the identification of nonspeech auditory patterns

Contextual effects in the identification of nonspeech auditory patterns

Auditory Enhancement of Increments in Spectral Amplitude Stems from More Than One Source

Is Off-Frequency Overshoot Caused by Adaptation of Suppression?

Contact Info

Product

Resources

About