Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Detecting coherent and incoherent frequency modulation.

R P Carlyon1

  • 1MRC Cognition and Brain Sciences Unit, 15 Chaucer Rd., Cambridge, UK. bob.carylon@mrc-cbu.cam.ac.uk

Hearing Research
|February 17, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Evidence for causal top-down frontal contributions to predictive processes in speech perception.

Nature communications·2017
Same author

Subcortical neural synchrony and absolute thresholds predict frequency discrimination independently.

Journal of the Association for Research in Otolaryngology : JARO·2013
Same author

Human auditory nerve compound action potentials and long latency responses.

Acta oto-laryngologica·2007
Same author

Dynamic aspects of the continuity illusion: perception of level and of the depth, rate, and phase of modulation.

Hearing research·2005
Same author

Detection, direction discrimination, and off-frequency interference of center-frequency modulations and glides for vowel formants.

The Journal of the Acoustical Society of America·2005
Same author

The effects of real and illusory glides on pure-tone frequency discrimination.

The Journal of the Acoustical Society of America·2004
Same journal

Estimation of hair cell loss from audiograms.

Hearing research·2026
Same journal

Cochlear size variation in a large-scale international multicentre cohort.

Hearing research·2026
Same journal

Estimation of minor-to-moderate conductive hearing loss with distortion-product otoacoustic emissions in humans.

Hearing research·2026
Same journal

Effects of early hearing deficits on olivocochlear efferent neuron morphology in mice.

Hearing research·2026
Same journal

Cochlear aging after synaptopathic noise: age-noise interactions in hair cell loss and axonal degeneration.

Hearing research·2026
Same journal

MERGE: Misophonia and emotion regulation in a guided experience sampling study.

Hearing research·2026
See all related articles

This study investigated auditory processing of frequency modulation (FM) across separate carriers. Findings suggest perceived FM coherence arises from fused auditory percepts, not a specific across-frequency mechanism, and reveal perceptual asymmetries in hearing.

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Signal Processing

Background:

  • The auditory system's ability to process complex frequency modulation (FM) patterns across different carrier frequencies is not fully understood.
  • Previous research suggested a neural mechanism sensitive to FM coherence, where modulation patterns across carriers are synchronized.
  • This study re-examines the evidence for such an across-frequency FM coherence mechanism.

Purpose of the Study:

  • To investigate the existence of a neural mechanism sensitive to FM coherence between widely separated auditory carriers.
  • To determine if observed FM discrimination effects stem from across-frequency processing or from perceptual fusion of the carriers.
  • To explore perceptual asymmetries in the auditory system related to frequency shifts and sweeps.

Main Methods:

Related Experiment Videos

  • Three experiments using two-tone complexes with carriers at 1100 Hz and either 1925 Hz or 2000 Hz, presented against pink noise.
  • Experiment 1: Discrimination of coherent vs. incoherent FM on carriers, replicating Furukawa and Moore (1996).
  • Experiments 2 & 3: Detection of static frequency shifts and dynamic frequency sweeps, examining effects of modulation direction and carrier fusion.

Main Results:

  • FM coherence effects were inconsistent, observed only in half of the participants in Experiment 1.
  • Detection of static frequency shifts and dynamic frequency sweeps was influenced by the direction of shifts/sweeps on individual carriers, regardless of modulation coherence.
  • A significant perceptual asymmetry was found: detection was better when the lower carrier frequency decreased while the higher carrier frequency increased.

Conclusions:

  • The observed effects of FM coherence likely arise from the perceptual fusion of the two carrier frequencies, not a dedicated across-frequency FM coherence mechanism.
  • Experiments 2 and 3 provide evidence for significant perceptual asymmetries within the human auditory system.
  • Findings challenge previous interpretations and highlight the role of integrated auditory percepts in complex sound processing.