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Temporary threshold shift due to recreational firearm use
1Department of Otolaryngology and Head and Neck Surgery, St Mary's Hospital, London, UK. urmibapat@yahoo.com
The Journal of Laryngology and Otology
|December 7, 2006
Summary
Recreational firearm use, even with ear protection, can cause temporary threshold shifts in hearing. This study found significant hearing changes in most participants after shooting a .22 caliber rifle.
Area of Science:
- Audiology
- Occupational Health
- Environmental Health
Background:
- Firearm use is a common recreational activity.
- Exposure to impulse noise from firearms can potentially cause hearing damage.
- Understanding the effects of recreational firearm noise on hearing is crucial for public health.
Purpose of the Study:
- To investigate the occurrence of temporary threshold shift (TTS) after recreational firearm use.
- To evaluate the impact of impulse noise from a .22 caliber rifle on hearing sensitivity.
Main Methods:
- An observational study involving 25 subjects was conducted in an indoor rifle range.
- Hearing thresholds were measured before and after firing five rounds of a .22 caliber rifle over 10 minutes.
- Statistically significant threshold shift was defined as 5 dB, and clinically significant as 10 dB.
Main Results:
- A statistically significant threshold shift was observed in 24 subjects, and a clinically significant shift in 12 subjects.
- Subjects with prior industrial noise exposure exhibited threshold shifts at more frequencies.
- No significant difference in hearing changes was noted between the left and right ears.
Conclusions:
- This study suggests that recreational firearm use can lead to temporary threshold shifts, even with ear protection.
- The findings indicate that impulse noise from firearms warrants attention regarding hearing conservation.
- Further research is needed to draw definitive conclusions on the long-term effects and optimal protection strategies.
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