Related Experiment Videos
The effects of microphone spacing on auditory localization
Audiology : Official Organ of the International Society of Audiology
|September 1, 1977
Summary
Wider microphone spacing (over 12.7 cm) improved sound localization in adults. Poorer localization occurred with smaller separations and at 30-degree azimuth, impacting hearing aid use in children.
Area of Science:
- Audiology
- Acoustic Perception
- Hearing Aid Technology
Background:
- Sound localization is crucial for auditory perception and spatial awareness.
- Understanding factors affecting localization is vital for optimizing hearing aid performance, especially in pediatric users.
- Previous research has explored various acoustic cues for sound localization.
Purpose of the Study:
- To investigate the impact of microphone separation on sound localization ability in normally hearing adults.
- To determine the effect of different sound source azimuths on localization accuracy.
- To provide insights into the design and fitting of binaural body hearing aids for infants and young children.
Main Methods:
- Ten normally hearing adults participated in the study.
- Sound stimuli (white noise bursts) were processed through body hearing aids and delivered via headphones.
- Localization ability was assessed across varying microphone separations (5.5-30.5 cm) and sound source azimuths (0-90 degrees).
Main Results:
- Improved sound localization was observed with wider microphone separations (15.2-30.5 cm) compared to smaller separations (5.5-12.7 cm).
- Localization accuracy consistently decreased at a 30-degree azimuth compared to other tested azimuths, irrespective of microphone spacing.
- Smaller microphone separations correlated with poorer localization performance.
Conclusions:
- Wider microphone spacing in body hearing aids can enhance sound localization in users.
- The findings suggest that the 30-degree azimuth presents a challenge for sound localization, even with optimal microphone placement.
- These results have significant implications for the development and fitting of binaural body aids for pediatric hearing loss, aiming to improve spatial hearing.