monitoring noise exposure presentation slide
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Noise monitoring techniquesTRANSCRIPT
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Monitoring Noise Exposure
Nor Azali Bin AzmirNoise & Vibration Lab
Faculty of Mechanical & Manufacturing Engineering, UTHM
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Presentation Outline
• The physics of Noise• Factories and Machinery Act (Noise Exposure)
Regulation 1989• Noise Control• Instrumentation• Noise measurement• Conclusion
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Terminology of Sound & Noise• Sound – Vibrations
transmitted through an elastic solid or a liquid or gas, with frequencies in the approximate range of 20 to 20,000 hertz, capable of being detected by human organs of hearing
• Noise – unwanted sound• Chronology – source,
distance and receiver• Characteristics – amplitude
and frequency• Unit – decibel (dB)
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Types of Noise
Steady state Continuous or Non-continuous
Fluctuating Impulsive
Single events Repeated impulse
Intermittent Steady or Fluctuating
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Legislation & Health Effect
• Factories and machinery (noise exposure) regulation 1989– Monitoring techniques (Area monitoring &
personal monitoring)– Permissible exposure limits (First schedule)– Warning signs for area exceed than 90 dB
• Hearing impairment / hearing lost– Audiometric test– Permanent and temporary threshold limits
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Hierarchy of Noise Control Measures
• Noise reduction Substitution (quieter method of work or
equipment) Engineering Control (Absorption, Insulation,
Distance, Silencer, Vibration isolation & Damping)• Exposure Reduction
Administrative procedures and arrangements Use of hearing protection devices
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Instrumentation
Noise Competent Person requirement :-• Noise Dosimeter • Sound Level Meter• Calibrator
Employer requirement :-• Exposure monitoring type• Factory Layout• General Process Flow
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Noise Measurement
• Noise Survey• How noise is each work area• What are the noise generators(output – noise mapping & zoning)
• Who are exposed• How long are they exposed(output – PEL & Dose)
Area Monitoring
Personal Monitoring
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Conclusion
• Each sound has their own source, has their own energy to transmit and human as a receiver (interpret as noise)
• Penalty not exceed RM 1000 if not comply with regulation
• Hearing loss is irreversible!!!!• Set the date to conduct noise monitoring
exposure (work activity & factory layout)
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The End of Presentation
THANK YOU… ANY QUESTIONS !!!