The Havs Calculator is very easy to use, just copy and paste the figures from the main HAV The Whole Body Calculator, works on the same principle. I can speak personally on the subject of Noise, Many years of Working in noisy environment These links are provided for your information This database of hand/arm vibration levels is compiled using information provided by the m study, many thanks to the companies that replied to my many emails and phone calls and als I accept no liability for any loss and/or damage suffered by any person in reliance to the Vibration Solutions. Next you will find the Daily and Weekly Noise Calculators from the HSE, extremely useful c exposure limits. I can speak personally on this, as I was injured by Noise. The last Parts of the Database are Calculators so we can make informed decisions if the He the Noise levels that can be incurred in our daily working life. http://www.thecc.org.uk/downloads/HAV.pdf Vibration Database http://www.scafftag.com/fshome.asp http://www.invc.co.uk/ http://www.hse.gov.uk/foi/internalops/fod/inspect/havs.pdf http://www.hse.gov.uk/vibration/ http://www.hse.gov.uk/pubns/indg296.pdf http://www.industrialsafetytalk.com/news/toa/toa100.html http://www.tuc.org.uk/h_and_s/index.cfm?mins=343 http://www.safeandhealthyworking.com/main-section/workplace-topics/vibration.cfm http://www.opsi.gov.uk/si/si2005/20051093.htm http://www.hse.gov.uk/noise/
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I accept no liability for any loss and/or damage suffered by any person in reliance to the data provided in this database. HSG 170 Vibration Solutions.
The Havs Calculator is very easy to use, just copy and paste the figures from the main HAVS Database
The Whole Body Calculator, works on the same principle.
I can speak personally on the subject of Noise, Many years of Working in noisy environments, and how hearing can be impaired and severely damaged.
These links are provided for your information
This database of hand/arm vibration levels is compiled using information provided by the manufacturers after many hours of careful study, many thanks to the companies that replied to my many emails and phone calls and also to the HAE
Next you will find the Daily and Weekly Noise Calculators from the HSE, extremely useful calculators, to keep you informed of the exposure limits. I can speak personally on this, as I was injured by Noise.
The last Parts of the Database are Calculators so we can make informed decisions if the Hearing Protection we can offer are adequate for the Noise levels that can be incurred in our daily working life.
Rounding noise levels to the nearest decibel and durations to the nearest 15 minutes (0.25 hours) is sufficiently precise.
Reference: Control of Noise at Work Regulations 2005, Schedule 1 Part 1
Noise Level (LAeq dB)
Exposure duration (hours)
Exposure points (job/task)
Exposure points per hour
Note: Exposure points can be used to prioritise noise control. The highest exposure points are given by the jobs, tasks, etc. which make the greatest contributions to daily noise exposure. Therefore, tackling these noise exposures will have the greatest e
You can enter data in the white cells only
Daily noise exposure (LEP,d)
Enter the LAeq (in dB) and select the daily exposure duration (in hours) in the white areas for up to eight jobs or tasks carried out by a person during their working day
Exposure points will appear for each entry and the overall daily personal noise exposure (LEP,d) will be displayed.
The Lower Exposure Action Value (an LEP,d of 80 dB) is represented by 32 exposure points, the Upper Exposure Action Value (LEP,d of 85 dB) by 100 points.
Weekly Noise Exposure Calculator
Day 1
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7
dB
Instructions for weekly exposure calculator
Leave a blank for the days not worked.
Reference: Control of Noise at Work Regulations 2005, Schedule 1 Part 2
Daily exposure (LEP,d dB)
You can enter data in the white cells only
LEP,w
Enter the daily personl noise exposure LEP,d (in dB) in the white areas for the days worked in the week.
The weekly personal noise exposure (LEP,w) will be displayed.
(in dB) in the white areas for the days worked in the week.
This spreadsheet contains calculators for three different methods of estimating the performance of hearing protection.
Each of the methods requires you to have information about the noise, and about the capabilities of the protector you are assessing.
The HML method can be used if you know both the A-weighted and C-weighted noise levelsThe octave band method can be used if you know the noise levels in frequency bands The SNR method can be used if you know the C-weighted noise levels
All three methods are nearly equivalent in their accuracy in the majority of noise situations.
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
The table below gives an indication of the protector factor that is likely to be suitable for different levels of noise. It based on the single number rating (SNR) value provided with a hearing protection device. The information is intended as a guide rat
This spreadsheet contains calculators for three different methods of estimating the performance of hearing protection.
Each of the methods requires you to have information about the noise, and about the capabilities of the protector you are assessing.
The HML method can be used if you know both the A-weighted and C-weighted noise levelsThe octave band method can be used if you know the noise levels in frequency bands The SNR method can be used if you know the C-weighted noise levels
All three methods are nearly equivalent in their accuracy in the majority of noise situations.
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
Select a protector with an SNR of …20 or less20-3025-3530 or more
The table below gives an indication of the protector factor that is likely to be suitable for different levels of noise. It based on the single number rating (SNR) value provided with a hearing protection device. The information is intended as a guide rat
HML Method
You can use this method if you know both the A-weighted and C-weighted noise levels
Data on the hearing protector H M
Noise levels
dB
dB at the ear
Colour codes:
Protector gives adequate protection, and does not 'over-protect'
Protector does not give adequate protection, or it 'over-protects'
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
A-weighted noise level, LA
C-weighted noise level, LC
Calculated level at the ear according to BS EN ISO 4869-2:1995 (a=1)
HSE recommends allowing 4dB for 'real-world' factors. Assume that this device will give:
You can use this method if you know both the A-weighted and C-weighted noise levels Enter values in all white cells.
L
dB
dB
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
Select a protector so that daily exposure is reduced to at least below 85 dB. Ideally, aim for between 80 and 75 at the ear. Avoid protectors resulting in less than 70 dB at the ear - this is 'over-protection' (see BS EN 458:2004).
Select a protector so that daily exposure is reduced to at least below 85 dB. Ideally, aim for between 80 and 75 at the ear. Avoid protectors resulting in less than 70 dB at the ear - this is
Octave band method
You can use this method if you know the noise levels in frequency bands
Octave band centre frequency (Hz) 63 125 250
Data on the hearing protectorMean attenuation (dB)Standard deviation in attenuation (dB)
Noise levels (dB)
dB
dB at the ear
Colour codes:
Protector gives adequate protection, and does not 'over-protect'
Protector does not give adequate protection, or it 'over-protects'
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
Enter values in all white cells. If the hearing protector data is stated in terms of 'Assumed Protection Values', APV or similar, then enter the APV values in the 'Mean' row, and leave the 'Standard deviation' row blank or with zeros.
Calculated level at the ear according to BS EN ISO 4869-2:1995 (a=1)
HSE recommends allowing 4dB for 'real-world' factors. Assume that this device will give:
500 1000 2000 4000 8000 A-weighted
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
Enter values in all white cells. If the hearing protector data is stated in terms of 'Assumed Protection Values', APV or similar, then enter the APV values in the 'Mean' row, and leave the 'Standard deviation' row blank or with zeros.
Select a protector so that daily exposure is reduced to at least below 85 dB. Ideally, aim for between 80 and 75 at the ear. Avoid protectors resulting in less than 70 dB at the ear - this is 'over-protection' (see BS EN 458:2004).
SNR Method
You can use this method if you know the C-weighted noise levels
Data on the hearing protectorSNR
Noise levels
dB
dB
dB at the ear
Colour codes:
Protector gives adequate protection, and does not 'over-protect'
Protector does not give adequate protection, or it 'over-protects'
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
C-weighted noise level, LC
Calculated level at the ear according to BS EN ISO 4869-2:1995 (a=1)
HSE recommends allowing 4dB for 'real-world' factors. Assume that this device will give:
Enter values in both white cells.
Each calculator is on a separate 'tab' within the spreadsheet. Click on the tab to go to the appropriate calculator.You can also move between the tabbed sheets by pressing Ctrl+Page Up or Ctrl+Page Down.
Select a protector so that daily exposure is reduced to at least below 85 dB. Ideally, aim for between 80 and 75 at the ear. Avoid protectors resulting in less than 70 dB at the ear - this is 'over-protection' (see BS EN 458:2004).
Exposure CalculatorExposure time
Hours Minutes
Job or process 1
Job or process 2
Job or process 3
Job or process 4
Job or process 5
Job or process 6
Job or process 7
Job or process 8
Err:502 dBA
Instructions for exposure calculator
Exposure time calculator
90 87 85 80
Instructions for exposure time calculator
Noise Level (Leq dBA)
You can enter data in the white cells only
See L108 "Reducing Noise at Work" for guidance on exposure calculations. LEP,d
Enter the Leq (in dBA) and the daily exposure duration (in hours and/or minutes) in the white areas for up to eight jobs or processes.
A factional exposure will appear for each entry and the overall daily personal noise exposure (LEP,d) will be displayed.
Time exposed to reach LEP,d shown (hours, minutes)
Noise Level (Leq dBA)
Enter an Leq value (in dBA), and the time of exposure to reach each of the LEP,d values will be shown in hours and minutes.
To see the time for an LEP,d value of your choice, enter it in the white cell on the right.
Fractional exposure Note: Fractional exposures can
be used to prioritise noise control. The highest fractional exposure values are given by the job or processes which make the greatest contributions to daily noise exposure. Therefore, tackling these noise sources will have t
(in dBA) and the daily exposure duration (in hours and/or minutes) in the white areas for up to eight jobs or processes.
A factional exposure will appear for each entry and the overall daily personal noise exposure (LEP,d) will be displayed.