Noise-induced HearingLoss (NiHL)

PRESENTED By: Adewale Adeniyi

Date: 30/10/15

105, Plot 1b, Ganiyu Bola Hussain Close off Alhaji Hakeem Odumosu Street, Off Rahaman Adebayo Street Lekki Phase 1, Lagos, Nigeria. T: +234-1-2716716-8www.oceon-group.com

QAC-TMP-015 Rev 2.0

Outline

� Noise Concept

� Noise Dose

� Noise Dose Rule of Thumb

� Effect of Noise

� Hearing Loss Video

� Hearing Loss Symptoms� Hearing Loss Symptoms

� Preventions

� Last Words

Noise Concept

� Noise means any unwanted sound.

� It is hazardous at high intensity and long exposure.

� Noise Levels are Expressed as Decibels (dB).

� 1+1+1 does not equal to 3� 1+1+1 does not equal to 3

� The Decibel is a logarithmic unit of measure so we can’t simply add numbers.

Noise Concept

� High Frequency Noise

- Deflects Easier, Easier to Shield and Easier to Insulate

- Power Tools, Saws, Grinders

- Sudden Release of Pressure

- Other High RPM Equipment

� Low Frequency Noise

- Harder to Shield and Harder to Absorb

- Power Presses

- Pumps, Compressors

- Other Low RPM Equipment

Noise Dose

Noise Dose.

How Loud, How long, How many times???

Noise Dose

� Regulated as an 8 hour Time Weighted Average (TWA)

� An 8 hr TWA of 90 dBA is designated as a Noise Dose of 100% (OSHA)

Noise Dose – Rule of Thumb

� For each 5 dB increase in noise, in order to be equivalent to the previous dose you must half the allowable exposure time.

95 dBA over 4 Hour TWA Period

100 dBA over 2 Hour TWA Period

105 dBA over 1 Hour TWA Period105 dBA over 1 Hour TWA Period

110 dBA over ½ Hour TWA Period

Noise Dose – Rule of Thumb

Any sound over 90 decibels is considered hazardous with prolonged exposure

Effect of Noise – Hearing Loss

� Major harmful effect of noise is Hearing Loss

� It is called Noise-induced Hearing Loss (NIHL)

� Hearing loss is partial inability to hear

� Deafness is total inability to hear

� It is Preventable

“PARTIAL” --- “TOTAL”

How Noise Affects the Ear

Noise-induced Hearing Loss

Hearing Loss Symptoms

� Difficulty in understanding what people are saying

� Listening to the television or radio at higher volume than inthe past

� Ringing, Roaring, Hissing, or Buzzing in the ear (tinnitus)

� Ear pain, Itching, or Irritation

Prevention of Noise-induced Hearing Loss

� Major Prevention is Ear Protection

� Use - Earplugs and Earmuffs (@ Noise level > 85db)

– (Earplugs and earmuffs can provide the wearer with at least 5 to 10 dB of attenuation)

� Obey Safety Signs

Prevention of Noise-induced Hearing Loss

� Maintain moderate sound level

� Avoid exposure to sounds of high intensities� Avoid exposure to sounds of high intensities

� Parties, Bars, e.t.c

Last Words…

� The functionality of our hearing contributes alot to our dailyendeavours. Verbal Communication is inevitable

� Having heard this information about Noise Concept and itseffect on our hearing, hearing impairment should beprevented at all times.

� If exposure is not avoidable,