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Free sound level meter calibration log template

Free sound level meter calibration log covering acoustic calibrator checks, NATA verification, A/C/Z weighting per AS/NZS IEC 61672.1 and AS/NZS 1269.1.

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Updated 26 Oct 2026

Sound Level Meter Calibration Log

Field check and verification | Per AS IEC 61672, AS/NZS 1269.1 and AS HB 9

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0 of 34 checks

Pre-check & condition

1Windscreen fitted and in good condition
2Battery fresh or unit fully charged
3Microphone diaphragm clean and undamaged
4Preamplifier serial cross-referenced to instrument
5Instrument allowed to thermally stabilise (10 minutes)
6Ambient temperature, humidity and barometric pressure recorded

Field calibrator check

7Calibrator certificate confirmed in date
8Adaptor fitted for microphone diameter (half inch or quarter inch)
9Calibrator coupled squarely with no audible air gap
10Pre-measurement reading recorded against 94 or 114 decibel reference
11Deviation within tolerance (Class 1 plus or minus 0.5 decibel, Class 2 plus or minus 1.0 decibel)
12Battery indicator on calibrator confirmed healthy

Survey settings

13Frequency weighting set (A, C or Z) per survey method
14Time weighting set (Fast, Slow or Impulse) per survey method
15Free-field or diffuse-field correction selected per environment
16Peak detector enabled where required by survey method
17Integration time set per AS/NZS 1269.1 or EPA guideline

Post-survey verification

18Calibrator re-fitted immediately after survey
19Post-measurement reading recorded against reference
20Deviation compared to pre-measurement reading
21Drift within tolerance band for the meter class
22Any failure flagged and instrument removed from service
23Survey data voided if post-check fails

Laboratory certificate

24NATA-accredited laboratory name and accreditation number recorded
25Certificate number and issue date filed against asset
26As-found and as-left tolerances at all test points reviewed
27Microphone, preamplifier and calibrator all verified together
28Next verification due date set in MapTrack
29Certificate attached to asset record

Operator record & defects

30Operator name and role recorded (hygienist, noise officer, consultant)
31Field check log signed against survey reference
32Defect or failure events documented with corrective action
33Survey reports linked to the supporting field check evidence
34Storage case, desiccant and transit condition reviewed

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Jarrod Milford

Jarrod Milford

Co-Founder & Commercial Director

Updated 26 October 2026
Also see:Compliance and inspections →Best inspection software →MapTrack vs SafetyCulture →

Short answer

A sound level meter calibration log records the field check with an acoustic calibrator before and after each measurement session, and the periodic laboratory verification of the meter, preamplifier and calibrator. Occupational hygienists and noise officers use it for every survey. Regulation 56 of the model WHS Regulations sets the noise exposure standard, determined under AS/NZS 1269.1:2005, and AS/NZS IEC 61672.1:2019 specifies sound level meter performance.

Checked against Model WHS Regulations as at 5 December 2025 (cited within as the Work Health and Safety Regulations 2011) on by the MapTrack templates team. How we check templates

Key takeaways

  • The MapTrack sound level meter calibration log template contains 34 checks across 6 sections. Sections covered: Pre-check & condition, Field calibrator check, Survey settings, Post-survey verification, Laboratory certificate, Operator record & defects.
  • Regulation 56 defines the exposure standard as LAeq,8h of 85 dB(A) or LC,peak of 140 dB(C), each determined under AS/NZS 1269.1:2005.
  • Yearly laboratory verification is common practice, not a legal interval; follow the manufacturer and any survey method that sets a shorter cycle.
  • Re-verify out of cycle after a drop, a failed field check or a microphone change, and don't use the meter until it passes.
  • Record the calibrator serial and reference level with each field check, so a failed check can be traced to the surveys before it.

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Used by construction, mining and field service teams

Saunders InternationalMineral ResourcesSupagasHacer GroupMetro TunnelUltrabuilt

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/NZS IEC 61672.1 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/NZS IEC 61672.1 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/NZS IEC 61672.1 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.
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  • File every completed form against the asset, location or person it covers.
  • Download any completed form as a PDF, with failed answers listed at the top.
  • Fill in forms offline; they upload when the device is back online.
  • 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.
  • Set who can view, fill in or edit forms with user roles.
  • Upload a paper form (PDF, Word, Excel or a photo) and MapTrack's AI builds a digital version for you to check.
  • Assign audits and send reminder emails to the people doing them.
  • Keep every audit, inspection and sign-off against the asset or site it covers.
  • Track corrective actions as work orders from finding to close-out, with each change in the activity log.

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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/NZS IEC 61672.1, 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. 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. 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. 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. 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. 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. 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. 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. 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.

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How 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/NZS IEC 61672.1 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.

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Frequently asked questions

A field check (also called a calibration check or verification check) is a quick on-site test using an acoustic calibrator coupled to the microphone, confirming that the meter reads within tolerance against a known reference tone of 94 decibel or 114 decibel. It does not adjust the instrument. A full calibration (more correctly called a verification) is performed annually by a NATA-accredited acoustic laboratory, exercising the meter across its full frequency, amplitude, weighting and time response range. AS/NZS IEC 61672.1 and AS/NZS 1269.1 expect both layers: field checks before and after every measurement session, and an annual NATA verification with a traceable certificate.

Best practice from AS/NZS IEC 61672.1, AS/NZS 1269.1 and the occupational hygiene profession is a field check before and after every measurement session using an acoustic calibrator, and a full verification by a NATA-accredited laboratory every 12 months. 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. Some industrial sites and environmental consultancies set a stricter six-month verification cycle for instruments used in litigation-grade survey work. Always follow the most stringent applicable requirement from the manufacturer, the survey methodology and the regulator expectation.

Class 1 and Class 2 refer to the type approval accuracy bands defined in AS/NZS IEC 61672.1. A Class 1 sound level meter is accurate to within plus or minus 0.7 decibel at reference conditions and is required for laboratory grade, environmental compliance and litigation-grade noise measurement. A Class 2 instrument is accurate to within plus or minus 1.0 decibel and is acceptable for occupational noise screening and basic workplace dose assessment. The log should record which class the instrument meets, since the tolerance band on field checks differs (plus or minus 0.5 decibel for Class 1, plus or minus 1.0 decibel for Class 2 in most occupational hygiene field practice).

A sound level meter microphone has a slightly different frequency response depending on whether the sound source approaches the diaphragm head-on (free-field) or arrives from many directions at once (diffuse-field). AS/NZS IEC 61672.1 type-approved instruments are normally optimised for one of these two conditions and apply a small correction to convert one to the other. For occupational noise surveys under AS/NZS 1269.1 the diffuse-field correction is typically applied because the worker is in a reverberant workplace. For environmental noise surveys with a clear line of sight to the source, the free-field response is used. The calibration log should record which correction is active.

Almost all acoustic calibrators output a single reference tone at 1000 hertz, which is the reference frequency for the A, C and Z weighting curves (they all converge to zero correction at 1000 hertz). The calibrator level is typically 94 decibel for general field use or 114 decibel for high-level environments such as machinery and aircraft work. The meter should be set to the time and frequency weighting that will be used in the survey itself and read the calibrator level within plus or minus 0.5 decibel for a Class 1 meter or plus or minus 1.0 decibel for a Class 2 meter. Higher deviation means an out-of-tolerance instrument that must be removed from service.

Yes. Download and use the sound level meter calibration log for free. It downloads as a ready-to-print PDF. No MapTrack account is required, and there is no licence restriction on using it across multiple meters, sites, projects or hygienists in your organisation. If you want to manage sound level meter calibration due dates digitally, with automated reminders before each annual NATA verification falls due, traceable acoustic calibrator certificates linked to each instrument in your asset register, and field check logs captured on a mobile device against each noise survey job, MapTrack can do that. Book a demo to see how.

Applicable regulatory standards

This template is a starting point. Check the current requirements that apply to your equipment, work and location. The template alone does not establish compliance.

  • Model Work Health and Safety Regulations

    Edition: Model WHS Regulations as at 5 December 2025 (cited within as the Work Health and Safety Regulations 2011)

    Defines the noise exposure standard, determined under AS/NZS 1269.1:2005, which the measurements are compared against.

    • reg 56: Defines the noise exposure standard as LAeq,8h of 85 dB(A) or LC,peak of 140 dB(C), each determined under AS/NZS 1269.1:2005.
    • Part 4.1: Noise: the exposure standard, managing the risk of hearing loss and audiometric testing.

    Safe Work Australia (drafted by the Parliamentary Counsel's Committee)

  • Occupational noise management, Part 1: Measurement and assessment of noise immission and exposure

    Edition: AS/NZS 1269.1:2005 (incl. Amd 1)

    Measurement and assessment of noise immission and exposure, the survey method the meter supports.

    Standards AustraliaSold by the publisher

  • Electroacoustics - Sound level meters, Part 1: Specifications

    Edition: AS/NZS IEC 61672.1:2019

    Performance specifications for sound level meters; it superseded AS IEC 61672.1-2004.

    Standards Australia and Standards New ZealandSold by the publisher

  • General requirements for the competence of testing and calibration laboratories

    Edition: AS ISO/IEC 17025:2018

    Competence of testing and calibration laboratories; NATA accredits laboratories against it.

    Standards AustraliaSold by the publisher

  • Model Code of Practice: Managing noise and preventing hearing loss at work

    Edition: November 2024 version

    Model Code on managing noise and preventing hearing loss. Legal effect only where a jurisdiction approves it.

    Safe Work Australia

Each source was read at its publisher and the page checked on 26 October 2026. The publisher's current text is the authority.

Check the current source

Sound Level Meter Calibration Log Template preview

Sound Level Meter Calibration Log Template template preview showing fields and layout

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  <p style="font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#071D49;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/NZS IEC 61672.1, 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>

Free to reuse, including commercially. This template is published under a Creative Commons Attribution 4.0 licence. Copy it, adapt it, put it on your own site or in your own docs. All we ask is that you credit MapTrack with a link back to this page. The snippet above already includes that credit, so if you use it as-is you’re covered.

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The MapTrack sound level meter calibration log template contains 34 checks across 6 sections.

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MapTrack Sound Level Meter Calibration Log Template, https://www.maptrack.com/templates/sound-level-meter-calibration-log
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MapTrack. (2026). Sound Level Meter Calibration Log Template [Checklist template]. Retrieved from https://www.maptrack.com/templates/sound-level-meter-calibration-log

Free to reuse with credit under a Creative Commons Attribution 4.0 licence. If you’d rather link straight to it, the page is https://www.maptrack.com/templates/sound-level-meter-calibration-log.

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