Topic Overview
Hearing loss caused by loud noises is called noise-induced hearing
loss (acoustic trauma). It is more common for gradual hearing loss to occur
from long-term (chronic) exposure to loud noise than from a sudden (acute) loud
burst of sound. Hearing loss may be temporary or permanent. Long-term exposure
to loud noises can cause permanent hearing loss.
Common causes of acoustic trauma include:
- Loud music, such as live musical performances and
home, auto, or portable stereo systems. Hearing loss is usually temporary but
can be permanent.
- Industrial sounds, such as traffic, sirens, jet
engines, power tools, chain saws, jackhammers, or hydraulic
machinery.
- Physical injury to the ear. Severe injury can
. Physical injury can be caused by:
- A blow to the side of the
head.
- An explosive burst of sound close to the ear, such as when an air bag is set off during a motor vehicle accident.
- Rapid
changes in environmental pressure, such as from underwater diving or descending
in an airplane.
Most people stop hearing high-frequency sounds, such as bells and
chimes, first. Later, it becomes harder to hear lower-frequency sounds, such as
voices.