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Uniquely Yours
Custom Fashion wear Manufacturer

In our customization process, we value the communication of details with our clients to ensure a thorough understanding of your needs and expectations.

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Uniquely Yours
Custom Fashion wear Manufacturer

In our customization process, we value the communication of details with our clients to ensure a thorough understanding of your needs and expectations.

view more

Traffic Noise Assessment

 ABOUTUS

Assess roadside noise exposure with a Class 1 handheld sound level meter, following standard measurement geometry and reporting both the continuous level and the peak from individual vehicle pass-bys.

explore ENVIRONMENTAL noise Instruments
Roadway noise is judged on more than one number​

Traffic noise assessment — for road-widening reviews, noise barrier evaluation, or resident complaint response — depends on capturing both the steady flow and the individual event.

Leq + Lmax

A complete survey reports the continuous equivalent level and the peak pass-by level together — neither number alone tells the full story.

~3 dB

Typical drop in traffic noise level each time distance from the roadway doubles — busy roads behave acoustically as a line source, not a single point.

Leading complaint

Road traffic is consistently one of the most frequently cited sources in urban environmental noise complaints, ahead of most other single sources.


  Descriptors commonly reported in a traffic noise survey


These are the values most often requested by planning authorities, EIA reviewers, or noise barrier designers.

Descriptor What it measures Typically used for
LAeq Equivalent continuous A-weighted sound level over the survey period Overall exposure comparison against a guideline or limit
LAmax Highest instantaneous level recorded during a single pass-by Assessing sleep disturbance and individual vehicle events
L10 Level exceeded for 10% of the measurement period Traditional UK/Commonwealth traffic noise descriptor
L90 Level exceeded for 90% of the measurement period Background level, excluding individual pass-by events
Lden Day-evening-night weighted average with an evening and night penalty WHO and EU-style long-term exposure assessment

From site setup to a report planners can act on

Traffic noise surveys live or die on measurement geometry and timing — get the position and the sampling period right, and the rest follows.

  • Site & Geometry Setup


    Set the microphone at the standard offset distance and height from the near-side traffic lane, away from reflective walls or other isolated noise sources. Getting this geometry wrong is the single most common source of traffic noise data that doesn't hold up to scrutiny.

  • Timed Field Measurement


    Run the survey across representative periods — typically a peak-hour and an off-peak sample — capturing LAeq continuously alongside individual LAmax events. Note weather conditions and wind speed; both affect propagation and can invalidate a reading if left unrecorded.

  • Calibration & Data Logging


    Verify the meter against a field calibrator before and after each session, and log every reading with its timestamp, location, and traffic conditions. This is what makes a reading defensible months later, when a project or complaint is reviewed.

  • Analysis & Reporting


    Compile LAeq and LAmax results against the relevant guideline or limit, and correlate spikes with traffic type and volume where possible. This turns a roadside reading into evidence a planning authority, EIA reviewer, or complaint process can actually use.

                                                                                                
Environmental Noise Instruments →

Built for accurate, repeatable roadside readings

The same core instrument set used across environmental noise surveys — a Class 1 handheld meter and a field calibrator — covers traffic noise assessment as well.

AWA5662 Multifunctional Sound Level Meter Front view
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AWA5662 Multifunctional Sound Level Meter

Digital detection technology with a wide dynamic range

Fast time response for capturing sharp pass-by peaks

Compact form factor for quick roadside setup and teardown
AWA6228A Noise and Vibration Analyzer04
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AWA6228A Noise and Vibration Analyzer (Sound Level Meter)

 IEC 61672 Class 1 accuracy for regulatory-grade measurements

Logs LAeq and LAmax simultaneously, with time-history data

1/1 and 1/3 octave band analysis for source diagnosis
AWA6021A03
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AWA6021A/L Class 1 Acoustic Sound Calibrator

Field verification before and after every survey


Complies with IEC 60942 Class 1

Confirms traceability of every reading in your report

  • 1. Why report both LAeq and LAmax?

  • 2. Why does microphone position matter so much?

  • 3.Do we need to survey both peak and off-peak hours?

  • 4. How does wind affect a roadside measurement?

  • 5. Can this data support a noise barrier design?

Planning a functional zone survey program?
We look forward to hearing from you.

phone-5 Tel: +86-19012832378

Contact Aihua Instruments
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