Related Experiment Videos
Speech intelligibility and spatial release from masking in young children
1Waisman Center, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, Wisconsin 53705, USA. litovsky@waisman.wisc.edu
The Journal of the Acoustical Society of America
|June 17, 2005
Summary
Young children and adults can both use spatial cues to understand speech in noisy environments. This study shows similar abilities in children and adults for speech intelligibility, even with competing sounds.
Area of Science:
- Auditory perception
- Developmental psychology
- Speech processing
Background:
- Speech intelligibility in noise is crucial for effective communication.
- Understanding how children process auditory information in complex environments is important for developmental research.
- Previous research indicates age-related differences in auditory processing, but spatial release from masking in young children requires further investigation.
Purpose of the Study:
- To compare speech intelligibility and spatial release from masking in young children (4–7 years) and adults.
- To investigate the impact of competitor type (speech vs. noise) and location on speech reception thresholds.
- To assess the utility of specific auditory testing measures for evaluating hearing-impaired children.
Main Methods:
- A four-alternative forced choice paradigm with spondees was used to test speech intelligibility.
- Target speech was presented from the front (0°), with competitors (speech or speech-shaped noise) positioned at 0° or 90°.
- Adaptive measurement of speech reception thresholds using a three-down/one-up algorithm.
Main Results:
- Children exhibited elevated thresholds in quiet and all masked conditions compared to adults.
- Masking effects were greater with speech-noise competitors than speech competitors, and with two competitors versus one.
- Masking was more pronounced when competitors were in front versus to the right; however, the amount of masking did not differ significantly between age groups.
- Spatial release from masking was comparable across age groups, except in the single-speech condition where it was greater in children.
Conclusions:
- Young children, like adults, can effectively use spatial cues and head-shadow effects to segregate sounds in noisy environments.
- The findings support the use of these auditory testing methods for studying speech perception in children, including those with hearing impairments.
- This research highlights the robust development of auditory spatial processing skills in early childhood.