Hearing Conservation_Noise Control-L_I v1.ppt
Transcript of Hearing Conservation_Noise Control-L_I v1.ppt
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
1/22
Hearing Conservationand Noise Control
Bureau of Workers Comp
PA Training for Health & Safety(PATHS)
1PPT-017-02
29 CFR 1910.95
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
2/22
Why??????
Its the LAW
Quality of Life
Gradual/Painless
Huh?What?
2PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
3/22
Anatomy of the Ear
3PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
4/22
Types of Hearing Loss
Conductive Occurs in ear canal, drum, ossicles
Central Damage to auditory nerve
Sensorineural Nerve damage in cochlea
4PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
5/22
Health Effects OtherThan Hearing Loss
5PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
6/22
Degree of Risk
Frequency How oftenworkers exposed
Intensity How loud
Duration How long
Individual Variability Persons resistance
6PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
7/22
How Loud is Loud?
Jet engine 140 db
Threshold of Pain 125 db
Pneumatic hammer 110 db
Compressed Air 105+ db
Punch Press 95 db
Lawn Mower 90 db Conversation 65 db
7PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
8/22
Hearing Protective EquipmentAdvantages/Disadvantages
Cotton Balls Virtually no protection
Canal Blockers/Ear Pods Only coveropening of ear canal
8PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
9/22
Hearing Protective EquipmentAdvantages/Disadvantages
Ear Muffs Good overallprotection
Ear Plugs Can be difficult toinsert & annoying to wear
9PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
10/22
How to Insert Earplugs
1. Roll the earplug into a tight cylinder
2. Lift the top of your ear to open the canal
3. Insert earplug into the open canal
4. Hold earplug in place until the foam expands
5. Repeat Steps 1 4 to insert into other ear
PPT-017-02 10
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
11/22
Safety Factor =Noise Reduction Rating
OSHA protocol
For A scale measurements, NRR minus 7
Example:
Noise exposure = 92 dBA
Manufacturers NRR = 15
15 7 = 8 (effective noise exposure reduction)92 8 = 84 dBA
11PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
12/22
NRR Determination:more from OSHA
If using dB(A) scale: Noise level minus [NRRminus 7 divided by 2] = Noise level at earex. Noise level = 98 dBA NRR = 25 dBA98 - [25-7/2=9] = 98-9=89dB.
If using dB(C) scale: Noise level minus [NRRdivided by two] = Noise level at earex. Noise level = 98 dBA NRR = 25 dBA98 [25/2=12.5] = 98-12.5=85.5 dB.
PPT-017-02 12
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
13/22
Exposure Limits Time Weighted Average (TWA)
Time Weighted Average Sound Level:
That sound level, which if constant over an 8
hour exposure, would result in the same dose
as is measured.
To determine TWA if working in different areaswith different noise level readings over 8 hour
work shift :
Use 1910.95, Appendix A, Table G-16A
Table A-1
13PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
14/22
OSHAs PermissibleNoise Exposure*
90 dB = 8.0 hours
92 dB = 6.0 hours
95 dB = 4.0 hours
97 dB = 3.0 hours
100 dB = 2.0 hours
102 dB = 1.5 hours
105 dB = 1.0 hours110 dB = 30 minutes
115 dB = 15 minutes
PPT-017-02 14
*At or above = controls: Engineering, Administrative, PPE
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
15/22
Exposure Limits
If exposure to 8 hour Time Weighted Average (TWA):
ACGIH 85 dBA (action level)
NIOSH 85 dBA (action level)
OSHA
84 dBA: nothing required85 89 dBA:
- monitoring
- testing
- protection- training
- recordkeeping
90 dBA (Permissible Noise Exposure Limit)
15PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
16/22
Noise Monitoring
Required by the OSHA standard to
identify all noise at or above 85 dBA
Monitoring must be performedwhenever there is an increase in
production or equipment is addedthat could increase the noise level
16PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
17/22
Audiograms
Audiograms are requiredevery year to identify ifthere has been a loss ofhearing.
The solid line shows anormal result with nohearing loss. The dotted
line represents a typicalnoise induced hearingloss (NIHL).
17PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
18/22
Training Requirements
Annual Training
Hearing Conservation Elements
Hearing Protectors
HearingConservation
Program
18PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
19/22
Recordkeeping
Monitoring records
(Keep for 2 years)
Audiometric testing records
(Keep for period ofemployment)
19PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
20/22
Noise Control
Engineering (e.g. sound barriers)
Administrative (e.g. worker rotation)
Personal Protective Equipment (e.g.
ear plugs, ear muffs)
20PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
21/22
What is your Company doing toControl Exposure:
Monitoring?
Engineering?
Administrative? PPE?
If youre not sure you should checkwith your Supervisor!
21PPT-017-02
-
7/27/2019 Hearing Conservation_Noise Control-L_I v1.ppt
22/22
Questions?
22PPT-017-02