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Arousing effect of sounds for testing infants hearing ability
Audiology : Official Organ of the International Society of Audiology
|September 1, 1983
Summary
Human voice, bird song, and chimes best elicit infant orienting reflexes. Infants respond more to complex sounds like crying than simple tones, highlighting the importance of calibrated auditory stimuli.
Area of Science:
- Auditory Perception
- Developmental Psychology
- Infant Behavior
Background:
- Understanding infant auditory processing is crucial for developmental research.
- Identifying effective auditory stimuli can inform early intervention strategies.
- Previous research has explored infant responses to various sounds, but optimal stimuli remain debated.
Purpose of the Study:
- To determine which calibrated sounds most effectively elicit orienting reflexes in infants.
- To compare infant responses to different sound categories, including human voice, natural sounds, and artificial tones.
- To investigate the impact of sound complexity on infant auditory attention.
Main Methods:
- Thirty-eight infants aged 6-21 months were exposed to 42 different calibrated sounds at 45 dB (A).
- Sounds were presented via loudspeakers in a randomized order.
- Infant orienting reflexes were systematically observed and recorded.
Main Results:
- Human voice, bird song, and chime sounds were identified as the most effective in eliciting orienting reflexes.
- Infant crying was the most potent human voice stimulus.
- Infants demonstrated a greater reaction to complex sounds compared to pure or warble tones.
Conclusions:
- Calibrated complex sounds, particularly human vocalizations like infant crying, are superior in eliciting infant orienting reflexes.
- Auditory stimuli must be well-calibrated to be considered audiologically acceptable for infant research.
- Findings contribute to understanding infant auditory salience and developing appropriate auditory assessment tools.