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Volume 39 #1

Contents

  1. MODERN APPROACHES TO COCHLEAR IMPLANTATION IN INNER EAR ANOMALIES: AUDIOLOGICAL ASPECTS
  2. THE ROLE OF THE ENVELOPE IN THE DISCRIMINATION OF RIPPLED SPECTRA BY LISTENERS WITH DIFFERENT AUDITORY SENSITIVITY
  3. INFLUENCE OF ACOUSTIC BACKGROUND ON THE CHOICE OF VISUAL STIMULI BY CHILDREN OF EARLY PRESCHOOL AGE
  4. TEMPORAL CHARACTERISTICS OF SPEECH IN PATIENTS WITH MODERATELY SEVERE CHRONIC POSTLINGUAL SENSORINEURAL HEARING LOSS WITHOUT THE USE OF HEARING AIDS AND WITH HEARING PROSTHETICS
  5. ON THE ROLE OF THE AUDITORY CRITICAL BANDS IN EFFECTS OF STIMULUS-SPECIFIC ADAPTATION IN THE ACTIVITY OF PRIMARY AUDITORY CORTEX NEURONS IN AWAKE MICE
  6. NICOTINAMIDE-STREPTOZOTOCIN-INDUCED TYPE 2 DIABETES MELLITUS LEADS TO IMPAIRED FUNCTION OF THE MAIN OLFACTORY SYSTEM IN MALE WISTAR RATS
  7. THREE-DIMENSIONAL OBJECT DETECTION BASED ON L-SHAPE MODEL IN AUTONOMOUS MOTION SYSTEMS

THE ROLE OF THE ENVELOPE IN THE DISCRIMINATION OF RIPPLED SPECTRA BY LISTENERS WITH DIFFERENT AUDITORY SENSITIVITY

© 2025 D. I. Nechaev, O. N. Milekhina, M. S. Tomozova, A. Ya. Supin

Institute of Ecology and Evolution of The Russian Academy of Sciences, Moscow, Leninsky Prospect, 33, 119071 Russia

Received 15 Aug 2024

A sound signal with a rippled spectrum exhibits envelope periodicity, which is absent in signals with a continuous spectrum. The study investigated the role of the signal envelope in discriminating signals with rippled spectra. The test signal was noise with a rippled spectrum and a spectral bandwidth of 2 octaves. Noise with a continuous spectrum was used as a reference signal. The experiments involved listeners with different levels of auditory sensitivity. To assess the ability to distinguish the density of rippled spectrum, a phase-reversal test was applied. Discrimination thresholds for spectral density were determined depending on the ripple spacing for two types of signals: without envelope modulation and with added envelope modulation. A decrease in auditory sensitivity resulted in a reduced ability to discriminate spectral density at all ripple spacing values. Amplitude modulation led to a deterioration in discrimination ability across all listeners and for all ripple spacing values, though not to thresholds determined by spectral mechanisms. It is suggested that discrimination in this task is driven by a temporal analysis mechanism rather than by envelope periodicity. The addition of modulation reduced the perception of repetition pitch.

Key words: hearing, hearing loss, rippled spectra, temporal processing, amplitude modulation

DOI: 10.31857/S0235009225010025  EDN: UUXMZG

Cite: Nechaev D. I., Milekhina O. N., Tomozova M. S., Supin A. Ya. Rol ogibayushchei v razlichenii grebenchatykh spektrov u slushatelei s raznym urovnem slukhovoi chuvstvitelnosti [The role of the envelope in the discrimination of rippled spectra by listeners with different auditory sensitivity]. Sensornye sistemy [Sensory systems]. 2025. V. 39(1). P. 14–24 (in Russian). doi: 10.31857/S0235009225010025

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