Noise Measurement & Control - IOSH Noise Measurement & Control IOSH – Tyne & Wear Branch 21st June...
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www.invc.co.uk Noise Measurement & Control IOSH – Tyne & Wear Branch 21 st June 2018 Gill Cussons 07837 385 248
Transcript of Noise Measurement & Control - IOSH Noise Measurement & Control IOSH – Tyne & Wear Branch 21st June...
www.invc.co.uk
Noise Measurement & Control
IOSH – Tyne & Wear Branch 21st June 2018
Gill Cussons 07837 385 248
www.invc.co.uk
Who are you listening to? • Business Owner of Noise & Vibration Solutions. • Consultant & Director at the Industrial Noise &
Vibration Centre. c5yrs Years • Previous UK Sales Manager Cirrus Research Plc
c8yrs m 07837 385 248
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Covering in this presentation
• Workplace noise assessments common errors • Practical Session • Noise Control : Basic techniques:
• Practical Session • Summary • Q&A’s
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Our ears do not perceive 3dBA to be ‘TWICE AS LOUD’
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Measurement: Common Errors
• Notknowinghowtouseyourequipment
• Notknowingwhatdatayouneed• Nottakingreadingsinthecorrectlocation• Notcalculatingtheexposureproperly• Stoppingthere…• JumpingtoConclusions
o Notidentifyingthecorrectnoisesources&Rankingthem
• Usingthewrongnoisecontroltechniques
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Practical Session: Measurement
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The Control of Noise at Work Regulations 2005
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Incomplete noise Risk Assessments
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Controlling the Noise
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Incorrect diagnosis of source
Rememberthe3dB(A)Rule-Youmustrankthenoisesourcesandstartwiththehighestsourcefirst.E.G2noisesourcesare93dBA(90+90)Ifyoucontrolnoisebyswitchingoneoff,reductionof3,maximumlevelreducedto90dBAIfyouhave2noisesourceswhere1islessthantheloudestnoisesourceSAY90dBA+88dBAandyoutacklethisone1styouaregoingtogetlessthan3dBAreduction
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Controlling the Noise at Source
1. Maintenance 2. Engineering the Noise at source
1. Damping 2. Isolation
3. Absorption & Insulation 4. Silencers
5. Enclosures
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Controlling the Noise Practical Session:
Take a look at the images and place in order of use and where they would
be used, for the following scenario
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Hydraulic Power Pack with Motor and Pump
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Consider these, in this order..
1. Maintenance 2. Engineering the Noise at source
1. Isolation 2. Damping 3. Silencers
4. Insulation with Absorption 5. Full Enclosure
6. Absorption in area
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Incorrect noise control recommendation:
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Problem Ÿ typically 87- 98dB(A) - high hygiene
Conventionally: Enclosure Ÿ Enclosures - c5dB(A) reduction
- usually increases operator noise level by 2 - 3dB(A) under platform!
Ÿ c£8000+ capital + access / hygiene / maintenance problems
BPM - engineering control Ÿ engineering source modifications Ÿ sophisticated high hygiene damping Ÿ 10 - 12dB(A) reduction at <<50% of the cost Ÿ x4 performance + no effect on access or hygiene ref untreated machine Ÿ maintenance and cleaning simplified
94dB(A) with enclosure - 82dB(A) with engineering noise control and no enclosure; PPE unnecessary; improved productivity, cleaning, access and maintenance ...
Enclosure on weigher platform
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In Summary
• Look at what needs to be achieved by the assessment & select correct measurement parameters and locations for that job – No measurements for measurements sake.
• Present report that provides not just the noise levels
but recommendations for Action. Most companies know they have a problem and while a report confirms this, the job should not stop there.
