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Sound Localization Test in Presence of Noise (Sound Localization Test) in Adults without Hearing Alteration
Gleide Viviani Maciel Almeida1, Angela Ribas1,2, Jorge Calleros3
1Masters and Doctorate in Communication Disorders Program, Universidade Tuiuti do Paraná, Curitiba, PR, Brazil.
International Archives of Otorhinolaryngology
|July 31, 2019
Summary
This study developed a sound localization test to assess hearing in noisy environments. Results indicate normal hearing individuals should correctly identify sound sources 70% of the time, even with background noise.
Area of Science:
- Audiology
- Neuroscience
- Acoustics
Background:
- Difficulty locating sound sources is common, even for those with normal hearing, especially in noisy environments.
- Competitive noise can significantly impair auditory perception and spatial hearing abilities.
Purpose of the Study:
- To develop, describe, validate, and establish normative data for a sound localization test.
- To evaluate the impact of varying noise levels on sound source identification.
Main Methods:
- A sound localization test was administered to 100 healthy adults with normal hearing.
- Pure tones were presented from speakers at 45° (left/right) with competing noise from a speaker at 180°.
- Three listening conditions were tested: no noise, 0 dB noise, and -10 dB noise relative to the signal.
Main Results:
- The test was validated, showing it is easy to set up and administer.
- Individuals with normal hearing are expected to correctly localize approximately 70% of presented stimuli.
- The average score was 21, with a median of 23 and a standard deviation of 3.05.
Conclusions:
- The developed sound localization test is a practical tool for assessing auditory spatial perception.
- The test effectively measures the interference of noise on sound localization abilities.
- Normative data suggest a 70% accuracy threshold for normal hearing in this test paradigm.
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