Stimulus pauses and perturbations differentially delay or promote the segregation of auditory objects: Psychoacoustics and modeling

James Rankin, Pamela J. Osborn Popp, John Rinzel

Research output: Contribution to journalArticle

Abstract

Segregating distinct sound sources is fundamental for auditory perception, as in the cocktail party problem. In a process called the build-up of stream segregation, distinct sound sources that are perceptually integrated initially can be segregated into separate streams after several seconds. Previous research concluded that abrupt changes in the incoming sounds during build-up-for example, a step change in location, loudness or timing-reset the percept to integrated. Following this reset, the multisecond build-up process begins again. Neurophysiological recordings in auditory cortex (A1) show fast (subsecond) adaptation, but unified mechanistic explanations for the bias toward integration, multisecond build-up and resets remain elusive. Combining psychoacoustics and modeling, we show that initial unadapted A1 responses bias integration, that the slowness of build-up arises naturally from competition downstream, and that recovery of adaptation can explain resets. An early bias toward integrated perceptual interpretations arising from primary cortical stages that encode low-level features and feed into competition downstream could also explain similar phenomena in vision. Further, we report a previously overlooked class of perturbations that promote segregation rather than integration. Our results challenge current understanding for perturbation effects on the emergence of sound source segregation, leading to a new hypothesis for differential processing downstream of A1. Transient perturbations can momentarily redirect A1 responses as input to downstream competition units that favor segregation.

Original languageEnglish (US)
Article number198
JournalFrontiers in Neuroscience
Volume11
Issue numberAPR
DOIs
StatePublished - Apr 20 2017

Fingerprint

Psychoacoustics
Auditory Perception
Auditory Cortex
Research

Keywords

  • Auditory perception
  • Auditory stream segregation
  • Computational neuroscience
  • Dynamical systems
  • Psychoacoustics

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Stimulus pauses and perturbations differentially delay or promote the segregation of auditory objects : Psychoacoustics and modeling. / Rankin, James; Osborn Popp, Pamela J.; Rinzel, John.

In: Frontiers in Neuroscience, Vol. 11, No. APR, 198, 20.04.2017.

Research output: Contribution to journalArticle

@article{66c66ea284694d8ba51450ffcb579690,
title = "Stimulus pauses and perturbations differentially delay or promote the segregation of auditory objects: Psychoacoustics and modeling",
abstract = "Segregating distinct sound sources is fundamental for auditory perception, as in the cocktail party problem. In a process called the build-up of stream segregation, distinct sound sources that are perceptually integrated initially can be segregated into separate streams after several seconds. Previous research concluded that abrupt changes in the incoming sounds during build-up-for example, a step change in location, loudness or timing-reset the percept to integrated. Following this reset, the multisecond build-up process begins again. Neurophysiological recordings in auditory cortex (A1) show fast (subsecond) adaptation, but unified mechanistic explanations for the bias toward integration, multisecond build-up and resets remain elusive. Combining psychoacoustics and modeling, we show that initial unadapted A1 responses bias integration, that the slowness of build-up arises naturally from competition downstream, and that recovery of adaptation can explain resets. An early bias toward integrated perceptual interpretations arising from primary cortical stages that encode low-level features and feed into competition downstream could also explain similar phenomena in vision. Further, we report a previously overlooked class of perturbations that promote segregation rather than integration. Our results challenge current understanding for perturbation effects on the emergence of sound source segregation, leading to a new hypothesis for differential processing downstream of A1. Transient perturbations can momentarily redirect A1 responses as input to downstream competition units that favor segregation.",
keywords = "Auditory perception, Auditory stream segregation, Computational neuroscience, Dynamical systems, Psychoacoustics",
author = "James Rankin and {Osborn Popp}, {Pamela J.} and John Rinzel",
year = "2017",
month = "4",
day = "20",
doi = "10.3389/fnins.2017.00198",
language = "English (US)",
volume = "11",
journal = "Frontiers in Neuroscience",
issn = "1662-4548",
publisher = "Frontiers Research Foundation",
number = "APR",

}

TY - JOUR

T1 - Stimulus pauses and perturbations differentially delay or promote the segregation of auditory objects

T2 - Psychoacoustics and modeling

AU - Rankin, James

AU - Osborn Popp, Pamela J.

AU - Rinzel, John

PY - 2017/4/20

Y1 - 2017/4/20

N2 - Segregating distinct sound sources is fundamental for auditory perception, as in the cocktail party problem. In a process called the build-up of stream segregation, distinct sound sources that are perceptually integrated initially can be segregated into separate streams after several seconds. Previous research concluded that abrupt changes in the incoming sounds during build-up-for example, a step change in location, loudness or timing-reset the percept to integrated. Following this reset, the multisecond build-up process begins again. Neurophysiological recordings in auditory cortex (A1) show fast (subsecond) adaptation, but unified mechanistic explanations for the bias toward integration, multisecond build-up and resets remain elusive. Combining psychoacoustics and modeling, we show that initial unadapted A1 responses bias integration, that the slowness of build-up arises naturally from competition downstream, and that recovery of adaptation can explain resets. An early bias toward integrated perceptual interpretations arising from primary cortical stages that encode low-level features and feed into competition downstream could also explain similar phenomena in vision. Further, we report a previously overlooked class of perturbations that promote segregation rather than integration. Our results challenge current understanding for perturbation effects on the emergence of sound source segregation, leading to a new hypothesis for differential processing downstream of A1. Transient perturbations can momentarily redirect A1 responses as input to downstream competition units that favor segregation.

AB - Segregating distinct sound sources is fundamental for auditory perception, as in the cocktail party problem. In a process called the build-up of stream segregation, distinct sound sources that are perceptually integrated initially can be segregated into separate streams after several seconds. Previous research concluded that abrupt changes in the incoming sounds during build-up-for example, a step change in location, loudness or timing-reset the percept to integrated. Following this reset, the multisecond build-up process begins again. Neurophysiological recordings in auditory cortex (A1) show fast (subsecond) adaptation, but unified mechanistic explanations for the bias toward integration, multisecond build-up and resets remain elusive. Combining psychoacoustics and modeling, we show that initial unadapted A1 responses bias integration, that the slowness of build-up arises naturally from competition downstream, and that recovery of adaptation can explain resets. An early bias toward integrated perceptual interpretations arising from primary cortical stages that encode low-level features and feed into competition downstream could also explain similar phenomena in vision. Further, we report a previously overlooked class of perturbations that promote segregation rather than integration. Our results challenge current understanding for perturbation effects on the emergence of sound source segregation, leading to a new hypothesis for differential processing downstream of A1. Transient perturbations can momentarily redirect A1 responses as input to downstream competition units that favor segregation.

KW - Auditory perception

KW - Auditory stream segregation

KW - Computational neuroscience

KW - Dynamical systems

KW - Psychoacoustics

UR - http://www.scopus.com/inward/record.url?scp=85019015634&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019015634&partnerID=8YFLogxK

U2 - 10.3389/fnins.2017.00198

DO - 10.3389/fnins.2017.00198

M3 - Article

AN - SCOPUS:85019015634

VL - 11

JO - Frontiers in Neuroscience

JF - Frontiers in Neuroscience

SN - 1662-4548

IS - APR

M1 - 198

ER -