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Echo

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...

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Related Experiment Video

Updated: Jul 16, 2025

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception

Published on: August 9, 2024

Predicting speech-in-speech recognition: Short-term audibility and spatial separation.

Peter A Wasiuk¹, Lauren Calandruccio², Jacob J Oleson³

¹Department of Communication Disorders, 493 Fitch Street, Southern Connecticut State University, New Haven, Connecticut 06515, USA.

The Journal of the Acoustical Society of America

|September 20, 2023

Summary

This summary is machine-generated.

Spatial separation improves speech-in-speech recognition by enhancing audible glimpses, even at fixed signal-to-noise ratios. This finding is crucial for understanding auditory perception in complex listening environments.

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Area of Science:

Auditory science
Speech perception
Psychoacoustics

Background:

Variability in speech-in-speech recognition is a key challenge.
Energetic and informational masking (IM) influence recognition, but IM is hard to quantify with dynamic maskers.

Purpose of the Study:

To investigate how short-term audibility and spatial separation affect speech recognition in two-talker masking.
To quantify the impact of spatial cues on informational masking.

Main Methods:

Thirty young adults with normal hearing (NH) performed sentence recognition tasks.
Speech reception thresholds and keyword recognition were measured under varying spatial conditions.
A glimpsing model quantified short-term audibility for keywords.

Main Results:

Speech recognition correlated with the proportion of audible keyword glimpses, irrespective of overall signal-to-noise ratio (SNR).
Greater short-term audibility was needed for colocated speech compared to spatially separated speech.
Spatial separation enhanced the benefit of increased target audibility on keyword recognition.

Conclusions:

Spatial cues improve the efficiency of glimpsing in competing speech for individuals with normal hearing.
The study provides a quantitative framework for estimating informational masking in different spatial configurations.