Free sound level meter calibration log template
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Free sound level meter calibration log covering acoustic calibrator checks, NATA verification, A/C/Z weighting per AS IEC 61672 and AS/NZS 1269.1.
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Updated 25 May 2026
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What is a sound level meter calibration log template?
A sound level meter calibration log is a two-part record used to manage acoustic measurement instruments deployed by occupational hygienists, environmental noise consultants, workplace safety officers and construction site noise officers. The first part is a field check log, completed before and after every measurement session using an acoustic calibrator (typically a 94 decibel or 114 decibel reference source coupled directly to the microphone), confirming that the indicated level sits within plus or minus 0.5 decibel of the reference tone for a Class 1 instrument or plus or minus 1.0 decibel for a Class 2 instrument. The second part is a full annual verification record, completed by a NATA-accredited acoustic calibration laboratory, that exercises the meter through its full frequency and amplitude range, applies free-field or diffuse-field corrections, verifies frequency weighting (A, C and Z), time weighting (Fast, Slow and Impulse) and the peak detector response, and issues a traceable certificate against the AS IEC 61672 type-approval baseline.
Sound level meters used to support occupational noise exposure assessments under AS/NZS 1269.1 and environmental noise assessments referenced under state EPA guidelines must be calibrated to maintain the legal weight of the measurement. AS IEC 61672 governs sound level meter performance, AS 1259 sets the broader Australian acoustic standards baseline, and AS HB 9 provides the occupational hygiene handbook used by certified occupational hygienists when conducting workplace noise surveys. Annual verification by a NATA-accredited laboratory, combined with documented field checks before and after each measurement, is the evidence chain that allows a noise dose, an environmental noise level or an exceedance report to stand up to scrutiny from a regulator, a court or an independent reviewer. Without this calibration log, the measurement is little more than an indicative number and cannot be relied upon to set hearing protection requirements, defend a noise complaint or demonstrate compliance with a workplace noise management plan.
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Benefits of using this sound level meter calibration log template
- Legal weight of the measurement: a calibrated meter with documented field checks gives a noise dose or environmental noise level the evidentiary value needed for a tribunal, court or EPA exceedance report
- Class 1 versus Class 2 accuracy: the log captures whether the instrument meets Class 1 (plus or minus 0.7 decibel) or Class 2 (plus or minus 1.0 decibel) accuracy bands per AS IEC 61672 type approval requirements
- Drift detection before each session: a pre- and post-measurement field check using the acoustic calibrator catches microphone drift or moisture damage before it invalidates the survey result
- NATA traceability: recording the annual verification certificate number and NATA laboratory accreditation links the field instrument to the national measurement standard for sound pressure
- Microphone protection programme: trends in field check readings reveal slow drift from windscreen damage, moisture ingress or diaphragm contamination that warrants a microphone replacement
- Audit-ready evidence: a stamped, dated calibration log satisfies WHS Regulations 2011 expectations and supports occupational hygiene survey deliverables under AS HB 9
- Acoustic calibrator currency: the log captures the calibrator certificate expiry date so the reference source itself is in date when used to field-check the meter
- Sector flexibility: a single log structure supports use across mining noise officers, construction site supervisors, environmental consultants and workplace safety officers without rework
Benefits of digitising forms in MapTrack
When you digitise sound level meter calibration logs in MapTrack, you get:
- Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
- Automatically get alerts when faults are identified.
- Link every form digitally as a PDF to the relevant asset, location or person.
- Receive a digital PDF copy with every submission to your email.
- Ability to share forms digitally.
- Build conditional logic (show or hide questions based on answers).
- Take pictures or attach photos. Not possible with a paper-based form.
- Electronic signatures.
- Edit forms later without reprinting.
- Restrict permissions (who can view, complete or approve).
- Build forms with AI (describe what you need and MapTrack suggests the form).
- Set recurring audit schedules with automatic reminders and escalation.
- Produce regulator-ready PDF compliance packs in one click.
- Track corrective actions from finding to close-out with full audit trail.
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What to include in a sound level meter calibration log template
This sound level meter calibration log template covers 13 key areas:
- Instrument details: make and model, serial number, asset or ID number, class (1 or 2) per AS IEC 61672, microphone type, preamplifier serial, last annual verification date and next due date
- Field check log (20 rows): date, time, operator name, calibrator reference level (94 or 114 decibel), pre-measurement reading, post-measurement reading, deviation and pass or fail result
- Acoustic calibrator details: make and model, serial number, reference level output, NATA verification certificate number, certificate expiry date and battery condition
- Annual verification record: NATA laboratory name, accreditation number, certificate number, date issued, next due date and a summary of the as-found and as-left tolerances at each test point
- Frequency weighting verification: documented A, C and Z weighting check results across the audible band including any free-field or diffuse-field correction applied
- Time weighting verification: documented Fast, Slow and Impulse response check results plus peak detector response verification against the type-approval baseline
- Environmental conditions: temperature, humidity and barometric pressure recorded against the field check to support correction for microphone sensitivity drift
- Measurement context: site or job reference, type of survey (occupational dose, environmental noise, plant noise emission) and any windscreen, tripod or extension used
- Operator competency: the field operator name, role (occupational hygienist, noise officer, environmental consultant) and any certification number relevant to the survey
- Sign-off: technician declaration and signature confirming the field checks and annual verification have been performed correctly and the instrument is fit for service
- Defect record: any failed field check or out-of-tolerance verification with the action taken (remove from service, microphone replacement, laboratory return)
- Storage and transit: case condition, desiccant currency and any drop or impact event since the last field check
- Linked records: reference to the noise survey reports, hearing conservation programme entries or environmental noise reports that the instrument supported during the period
How to use this sound level meter calibration log template
- 1. Prepare the instrument: fit the windscreen, install fresh batteries or charge the unit fully, allow the meter to thermally stabilise for at least 10 minutes in the measurement environment and record the ambient temperature, humidity and barometric pressure on the field check log
- 2. Fit the acoustic calibrator: confirm the calibrator certificate is in date, fit the appropriate adaptor for the microphone diameter (typically half inch or quarter inch), couple the calibrator squarely to the microphone with no audible air gap and switch on the reference tone
- 3. Record the pre-measurement field check: set the meter to the appropriate frequency and time weighting for the survey, observe the indicated level, record it on the log against the calibrator reference (typically 94 decibel or 114 decibel) and confirm the deviation sits within plus or minus 0.5 decibel for a Class 1 meter or plus or minus 1.0 decibel for a Class 2 meter
- 4. Conduct the noise measurement: complete the survey per the relevant standard (AS/NZS 1269.1 for occupational dose, EPA guideline for environmental noise, OEM emission test method for plant noise) recording all setup parameters, weighting selections, integration time and tripod or extension use
- 5. Record the post-measurement field check: re-fit the acoustic calibrator immediately on completion of the survey, observe the indicated level and record the post-measurement reading on the log, comparing against the pre-measurement reading to detect any drift during the session
- 6. Take action on any failure: if either field check exceeds the tolerance, mark the instrument out of service, void any measurement taken since the last successful field check, return the instrument to a NATA laboratory for investigation and replace the microphone if drift is suspected
- 7. Schedule the annual verification: send the meter, preamplifier and acoustic calibrator to a NATA-accredited acoustic calibration laboratory annually, attach the certificate against the asset record on return and set the next due date in the asset register
- 8. Close the record: sign the field check log against the operator name and role, file the survey results with the field check evidence, and update the asset register with the new next-due date for both the field check programme and the annual NATA verification
In MapTrack, you can automate compliance tracking and audit trails. Each submission is stored as a timestamped PDF against the asset record.
Get the free templateEnter your email above to download the full sound level meter calibration log template as a PDF.Back to download formHow often should you complete this calibration log?
A sound level meter requires a field check using an acoustic calibrator before and after every measurement session, which in occupational hygiene practice means before and after every workplace noise survey, environmental noise measurement or plant emission test. A field check takes less than a minute per check and is the only practical way to confirm that the microphone has not drifted, that moisture has not affected the diaphragm and that the instrument is reading correctly within the Class 1 or Class 2 tolerance band. Full annual verification by a NATA-accredited acoustic calibration laboratory is required for the meter, the preamplifier and the acoustic calibrator itself. The 12-month verification cycle aligns with the AS IEC 61672 type-approval expectation. Re-verify out of cycle if the meter is dropped, exposed to extreme temperature or humidity, fails a field check or has its microphone replaced. Always follow the most stringent requirement from the manufacturer, the survey methodology and the regulator expectation.
Frequently asked questions
Applicable regulatory standards
This template aligns with the following regulations and standards:
- AS IEC 61672 (Electroacoustics - Sound level meters)
- AS/NZS 1269.1 (Occupational noise management)
- AS 1259 (Acoustic standards)
- AS HB 9 (Occupational hygiene measurement)
- WHS Regulations 2011 Chapter 4 Part 4.1 (Noise)
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<p style="font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#0E7490;margin:0;">Free template</p>
<p style="font-size:18px;font-weight:700;color:#071D49;margin:6px 0 0;">Sound Level Meter Calibration Log Template</p>
<ul style="margin:12px 0 0;padding-left:18px;color:#374151;font-size:14px;line-height:1.6;">
<li style="margin:4px 0;">Instrument details: make and model, serial number, asset or ID number, class (1 or 2) per AS IEC 61672, microphone type, preamplifier serial, last annual verification date and next due date</li>
<li style="margin:4px 0;">Field check log (20 rows): date, time, operator name, calibrator reference level (94 or 114 decibel), pre-measurement reading, post-measurement reading, deviation and pass or fail result</li>
<li style="margin:4px 0;">Acoustic calibrator details: make and model, serial number, reference level output, NATA verification certificate number, certificate expiry date and battery condition</li>
<li style="margin:4px 0;">Annual verification record: NATA laboratory name, accreditation number, certificate number, date issued, next due date and a summary of the as-found and as-left tolerances at each test point</li>
<li style="margin:4px 0;">Frequency weighting verification: documented A, C and Z weighting check results across the audible band including any free-field or diffuse-field correction applied</li>
<li style="margin:4px 0;">Time weighting verification: documented Fast, Slow and Impulse response check results plus peak detector response verification against the type-approval baseline</li>
</ul>
<p style="font-size:13px;color:#6B7280;margin:14px 0 0;padding-top:12px;border-top:1px solid #E5E7EB;">Free <a href="https://www.maptrack.com/templates/sound-level-meter-calibration-log" style="color:#071D49;font-weight:600;text-decoration:none;">Sound Level Meter Calibration Log Template</a> by MapTrack</p>
</div>Please keep the “by MapTrack” attribution link in the snippet.
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