noise measurement & control - iosh noise measurement & control iosh – tyne & wear...

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Noise Measurement & Control

IOSH – Tyne & Wear Branch 21st June 2018

Gill Cussons 07837 385 248

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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.

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gillcussons@uk-nvs.com

(m) 07837 385 248