Speech intelligibility in noise with ear protectors

Area of Science:

• Audiology
• Occupational Health
• Speech Science

Background:

• Occupational noise exposure can lead to hearing loss.
• Effective communication is crucial in noisy work environments.
• English fluency may influence speech perception in noise.

Purpose of the Study:

• To evaluate speech perception in noise for noise-exposed workmen and normal-hearing individuals.
• To assess the impact of hearing protectors on speech intelligibility.
• To examine the role of age and English fluency on speech perception.

Main Methods:

• Speech perception tests were conducted under controlled laboratory conditions.
• Participants included noise-exposed workmen and normal subjects, divided by age and English fluency.
• Hearing protectors were used in some conditions to measure their effect on speech intelligibility.

Main Results:

• Normal-hearing subjects showed decreased speech discrimination with increasing noise complexity (white noise, crowd noise).
• Hearing protectors did not affect intelligibility in normal-hearing subjects.
• Non-fluent English speakers had lower scores across all conditions.
• Individuals with high-frequency or flat hearing loss experienced further reduced speech discrimination when wearing hearing protectors.

Conclusions:

• Hearing protectors can impair speech perception in individuals with hearing loss.
• English fluency is a significant factor in speech perception in noisy environments.
• Occupational hearing loss and communication challenges require tailored interventions.