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NIHL (managed by (hearing amplification (hearing aids, cochlear implant),…
NIHL
managed by
hearing amplification
hearing aids
cochlear implant
counselling
annual monitoring
assistive listening devices
communication strategies
tinnitus therapy
characterized by
Hearing loss
Tinnitus
Difficulity understanding speech
assessed by
PTA
showed
Sloping configuration
Bilateral symmetric SNHL
Usuallly showed notch at around 4kHz
due to
acoustic reflex attenuates loud noises below 2kHz
resonance of the outer ear / ear canal
OAE
showed
Reduce amplitude/less robust emission at HF
Greater loss at high frequency region
Reduce overall amplitude across frequency/ Absent of emission
Immitance
showed
Present if HL is not more than 80 dBHL
Type A tympanogram
prevented by
personal
Adopt behaviors to protect hearing
such as
Turn the volume down
Avoid or limit the loud, noisy activities and places
Take breaks from the noise
Use hearing protection devices
such as
earmuffs
earplugs
government
through
Department of Occupational Safety and Health (DOSH)
to
Prevent the occurrences of noise induced deafness
Provide legal guidance to preserve worker’s hearing
is defined as
a hearing impairment
that can happen at any age
resulting from prolonged exposure to high decibel sound
which can be permanent
which 12% or more of the global population are at risk
induced by
Noise
depending on
Duration of Exposure
Type of Noise Environment
Source Distance(s)
Individual Susceptibility
Intensity of Noise
Type of Noise
caused
degeneration of auditory nerve
loss of hair cells (mostly OHCs)