PowerToolsPros Job Lab POWERTOOLSPROS JOB LAB
Menu

powertoolspros.net · Daily noise exposure calculation record · EXPOSURE RECORD

Daily noise exposure

Job / reference: ______________________________Printed date: ____

Formula registry version 1.0.0 · researched 2026-07-24 · effective basis 2006-04-06

EX-02 · Exposure & health

Daily noise exposure

Enter representative LAeq,T levels in dB(A) and non-overlapping trigger durations in hours. Peak noise and weekly exposure are separate assessments.

EXPOSURE RECORD

Entered noise periods

Period 1
Period 2

Method and worked example

LEX,8h = 10 log10((Σ tᵢ × 10^(Lᵢ/10)) ÷ 8)

Do not arithmetically average decibels. Worked example: 88 dB(A) × 2 h plus 94 dB(A) × 0.5 h gives 84.9794123007, displayed as 84.98 dB(A).

Decision bands: below 80; 80 to below 85; 85 and above. The 87 dB(A) limit value is after accounting for hearing protection and is not an unadjusted-result comparison.

Blank worksheet

Period / LAeq,T dB(A) / duration h:
Period / LAeq,T dB(A) / duration h:
Energy sum / 8:
LEX,8h:

Daily noise exposure record

Result recordEXPOSURE RECORD

Worked example — default entered values

84.98 dB(A) LEX,8h

Lower exposure action value reached.

This result does not assess peak noise.

Assumptions register

Period 1: 88 dB(A) × 2 h · Period 2: 94 dB(A) × 0.5 h · Total entered duration: 2.5 h

Each entered level is LAeq,T and representative of its stated period.

Periods do not overlap.

Unentered periods contribute no material occupational noise.

Hearing-protection attenuation is not subtracted.

△ Interpret as an exposure record

Missing/wrong-unit/overlapping periods block calculation. Peak noise requires peak assessment; material day-to-day variation requires weekly exposure calculation.

EXPOSURE RECORD. This numeric result does not assess peak noise and is not permission to continue work. A noise assessment and any required controls remain necessary.

Source register · registry version 1.0.0

UK legislation · made 18 June 2005; commenced 6 April 2006, The Control of Noise at Work Regulations 2005 — Schedule 1, Part 1 — effective 2006-04-06 — accessed 2026-07-24

HSE, Exposure calculators and ready-reckoners — accessed 2026-07-24

HSE, Noise at work — Regulations — accessed 2026-07-24

Formula researched 2026-07-24 · effective basis 2006-04-06