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Noise Dosimetry Testing – OSHA Personal Noise Exposure

Casella dBadge2 personal noise dosimeter used for occupational noise exposure testing

Personal noise dosimetry measures the sound exposure an employee actually receives while moving through a normal work shift.

On-Site Acoustic Testing provides occupational noise exposure surveys and personal noise dosimetry for industrial, manufacturing, commercial and other workplaces. Dosimetry is particularly useful when employees move between work areas, operate different equipment, or experience changing noise levels that cannot be characterized adequately by a few stationary sound-level measurements.

OSHA Personal Noise Exposure Measurements

For OSHA general-industry evaluations, 29 CFR 1910.95 establishes an 8-hour permissible exposure limit (PEL) of 90 dBA using a 5 dB exchange rate. A continuing hearing-conservation program is required when employee exposure equals or exceeds an 8-hour TWA of 85 dBA, the OSHA action level. The applicable measurement settings and criteria depend on the purpose of the survey and the regulatory or project requirements.

Full-Shift Noise Dosimetry

A personal dosimeter is worn near the employee’s hearing zone while normal work activities are performed. Full-shift sampling can document time-weighted average exposure and accumulated noise dose while capturing the changing conditions encountered throughout the workday.

Shorter samples can be useful for screening or investigating particular tasks, but extrapolation requires the sampled period to be representative of the employee’s actual exposure. Where compliance documentation is the objective, the sampling strategy is selected accordingly.

Casella dBadge2 Personal Noise Dosimeters

OSAT uses Casella dBadge2 personal noise dosimeters for current occupational-noise surveys. Modern dosimeters can record multiple exposure parameters during the same measurement period, allowing the collected data to be evaluated using the criteria appropriate to the project.

Noise Exposure Reports and Follow-Up Testing

Results can include measured TWA, noise dose, peak levels and time-history information as appropriate to the survey. Where elevated exposures or specific noisy operations are identified, dosimetry can be supplemented with sound-level and frequency-spectrum measurements to help characterize the contributing sources and evaluate potential noise-control measures.

OSAT can also support broader OSHA noise consulting and industrial noise testing requirements.

Discuss Your Workplace Noise Survey

Contact On-Site Acoustic Testing with the facility location, employee work patterns, shift duration and reason for testing so an appropriate measurement plan can be developed.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Noise Dosimetry Testing – OSHA Personal Noise Exposure Read More »

OSHA Noise Consulting and Occupational Noise Testing

Occupational noise measurements and consulting for employers evaluating workplace sound exposure and OSHA noise requirements.

On-Site Acoustic Testing provides field measurements and technical support for workplace noise investigations. The scope can range from an initial facility noise survey to personal dosimetry and detailed source measurements where employee exposure or noise-control measures require further evaluation.

OSHA Occupational Noise Measurements

For OSHA general industry, 29 CFR 1910.95 establishes an 8-hour permissible exposure limit of 90 dBA using OSHA’s 5 dB exchange rate. The standard’s hearing-conservation provisions apply when employee exposure equals or exceeds an 8-hour time-weighted average of 85 dBA. Measurement settings and sampling strategy are selected for the applicable regulatory and project objective.

Personal Noise Dosimetry

Employees who move between work areas or encounter changing noise conditions may require personal exposure measurements rather than stationary sound-level readings alone. Our noise dosimetry testing documents exposure over the measurement period and can provide TWA, dose and time-history information as appropriate.

Facility Surveys and Noise Sources

Area measurements, frequency-spectrum analysis and equipment or process measurements can supplement dosimetry to identify the sources contributing to employee exposure. See also our industrial and factory testing and specialized noise-source localization services.

Hearing-Conservation Support

Measurement results can be used by an employer to determine which employees or job classifications are affected and to support decisions concerning engineering or administrative controls, hearing protection and hearing-conservation requirements. The appropriate response depends on the measured exposure, work conditions and applicable requirements.

U.S. and International Field Service

OSAT performs workplace noise measurements throughout the United States and internationally. Rush scheduling may be available when project conditions require expedited field work.

Discuss an OSHA Noise Survey

Contact On-Site Acoustic Testing with the facility type, work schedule, principal noise sources and reason for testing so an appropriate measurement plan can be developed.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

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Restaurant, Bar and Nightclub Noise Testing

Restaurants, bars, nightclubs and entertainment venues can create several different acoustical problems at once: high interior sound levels, employee noise exposure, sound transmission to neighboring spaces, and community noise at nearby properties.

On-Site Acoustic Testing provides independent field measurements to identify and document these conditions and to support practical noise-control decisions.

Interior Sound Level Testing

Measurements can document ambient and amplified sound levels in dining rooms, bars, performance areas, kitchens and other front- and back-of-house spaces. Frequency-spectrum analysis can help identify the portions of the sound system or other sources contributing most strongly to a problem.

Employee Noise Exposure

Where employee exposure is a concern, personal noise dosimetry testing can document exposure over a work shift or representative operating period. Results can be evaluated under the applicable occupational-noise framework, including OSHA requirements where appropriate.

Noise Transmission to Adjacent Spaces

Bass and amplified music can be particularly difficult to control because sound may travel through walls, floors, ceilings, structural connections and penetrations. OSAT can combine sound-level and frequency measurements with building-acoustics testing to investigate transmission between tenant spaces, residences and other adjoining occupancies.

Exterior and Community Noise

Outdoor seating, rooftop equipment, music, patrons and mechanical systems can affect nearby properties. Measurements may be made at property lines, façades or other relevant receiver locations and compared with project-specific requirements or applicable criteria.

Long-Term Noise Monitoring

For intermittent conditions or complaints that cannot reliably be reproduced during a short site visit, long-term noise-level and audio recording can help correlate events with time, operating conditions and measured sound levels.

Noise level monitor used for long-term sound level monitoring

Noise Control and Follow-Up Testing

Testing can establish existing conditions, identify dominant sources and transmission paths, and provide a technical basis for mitigation. See our noise-control and sound-mitigation consulting services for more complex investigations.

Discuss a Restaurant or Entertainment Noise Project

Contact On-Site Acoustic Testing with the type of venue, operating hours, noise source, affected locations and objective of the investigation so an appropriate measurement approach can be developed.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

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Marine Noise, Vibration and Air Quality Testing

On-Site Acoustic Testing provides field noise, vibration and indoor-air-quality measurements aboard marine vessels and other marine installations.

Shipboard Noise Testing

Measurements can characterize machinery spaces, passenger or crew areas, HVAC systems and sound transmission between compartments. Frequency-spectrum analysis can help identify dominant machinery and tonal components.

Marine Vibration Measurements

Multi-axis vibration and frequency analysis can be used to investigate rotating machinery, structural vibration and conditions affecting occupied spaces or equipment.

Air Quality and Air Sampling

Direct-read measurements and contaminant-specific air sampling can be performed in occupied areas, machinery spaces and other appropriate locations. See our air-quality and air-sampling services.

Project-Specific Standards

Marine projects can involve ISO, IMO, owner, classification-society or other project-specific criteria. The applicable requirements are established before testing rather than assuming one protocol applies to every vessel.

Discuss a Marine Testing Project

Provide the vessel or installation type, operating condition, measurement objectives and applicable specification.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Marine Noise, Vibration and Air Quality Testing Read More »

Elevator and Escalator Ride Quality Testing

PMT EVA-625 elevator vibration analyzer used for elevator ride quality testing

Independent elevator and escalator ride-quality testing using the PMT EVA-625 vibration and sound analysis system.

On-Site Acoustic Testing provides objective field measurements of elevator and escalator ride quality for building owners, facility managers, consultants, installers and modernization projects. Measurements can establish a performance baseline, document changes over time and provide data for troubleshooting vibration, motion and sound concerns.

Elevator Ride Quality Testing

Elevator ride quality is evaluated from measured motion, vibration and sound during operation. Depending on the investigation, the recorded data can be used to evaluate acceleration and deceleration, jerk, velocity, vibration in multiple axes and in-cab sound, as well as to identify repeatable events associated with particular portions of travel.

PMT EVA-625 Elevator Vibration Analysis System

OSAT uses the Physical Measurement Technologies EVA-625 Elevator Vibration Analysis system with EVA analysis software. The instrument is designed specifically for elevator and escalator ride-quality, vibration and sound measurements and supports standardized analysis as well as detailed diagnostic review of recorded data.

PMT EVA-625 elevator vibration analyzer used for elevator ride quality testing
PMT EVA-625 elevator vibration and ride-quality analysis system

Current Elevator Ride Quality Standard

For elevators, ISO 8100-34:2021 is the current international standard for measurement of lift ride quality and replaced ISO 18738-1:2012. The standard addresses the measurement and reporting methodology for ride quality during lift motion; it does not itself define acceptable or unacceptable ride-quality limits.

Escalators and Moving Walks

Ride-quality measurements can also be performed for escalators and moving walks. ISO 8103-9:2022 replaced ISO 18738-2:2012 for measurement and reporting of escalator and moving-walk ride quality. Project requirements should determine the applicable procedure and reporting criteria.

Troubleshooting and Condition Documentation

EVA-625 data can support investigation of ride-quality complaints and mechanical or control-system issues. Applications include documenting pre- and post-modernization performance, identifying repeatable vibration events, evaluating machine vibration, and establishing baseline data for comparison during future testing.

Where additional diagnostic information is useful, OSAT can supplement ride-quality measurements with vibration and frequency-spectrum analysis of elevator machinery and other moving components.

Discuss Elevator or Escalator Testing

Contact On-Site Acoustic Testing to discuss the equipment, complaint or performance criteria and the measurements required.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Elevator and Escalator Ride Quality Testing Read More »

Industrial and Factory Noise, Vibration & Air Quality Testing

Industrial noise, vibration and air-quality measurements for manufacturing plants, production facilities and other complex workplaces.

On-Site Acoustic Testing provides independent field testing to help facility managers, safety professionals, engineers and industrial clients characterize environmental conditions in operating facilities. Investigations can address employee noise exposure, equipment and process noise, vibration, indoor air quality and other site-specific concerns.

Industrial and Factory Noise Testing

Industrial facilities often contain multiple simultaneous noise sources, changing operating conditions and employees who move between work areas. OSAT can perform area sound-level measurements, frequency-spectrum analysis, equipment noise measurements and personal noise dosimetry to document the conditions relevant to the investigation.

Where occupational exposure is the concern, measurements can be planned around the applicable OSHA or project criteria. Where the objective is noise control or troubleshooting, detailed spectral and source measurements can help identify the equipment, process or transmission path contributing to the problem.

Noise Source Identification and Troubleshooting

Factory noise problems are not always resolved by measuring an overall decibel level. OSAT can use frequency analysis and specialized source-localization methods to distinguish individual contributors in complex environments. See our specialized noise testing and source localization services for investigations requiring acoustic-camera or directional measurements.

Machinery and Structural Vibration

Vibration measurements can be used to characterize machinery, building elements and other sources of structure-borne vibration. Depending on the project, measurements may include multi-axis vibration and frequency-spectrum analysis to identify dominant frequencies, compare operating conditions or help trace a vibration source.

Industrial Air Quality and Air Sampling

OSAT also performs indoor air quality and air-sampling testing. Investigations can combine direct-read measurements with contaminant-specific personal or area sampling when appropriate. Sampling media, flow rate, duration and analytical method are selected for the substance or condition being evaluated rather than applying a generic air-quality test.

Applications

  • Manufacturing and production facilities
  • Warehouses and distribution operations
  • Fabrication and machine shops
  • Food and beverage processing
  • Pharmaceutical and electronics manufacturing
  • Utilities and energy facilities
  • Building-products and materials manufacturing
  • Recycling and waste-processing operations
  • Equipment and process troubleshooting

Independent Field Documentation

Testing can be structured to establish baseline conditions, investigate a complaint, evaluate a specific process or piece of equipment, document employee exposure, compare pre- and post-correction conditions, or provide independent measurements for engineering and management decisions.

Discuss an Industrial Testing Project

Contact On-Site Acoustic Testing with the facility type, process or equipment involved, operating schedule and the concern to be investigated so an appropriate field measurement plan can be developed.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Industrial and Factory Noise, Vibration & Air Quality Testing Read More »

ASTM E966 Façade, Window and Door Acoustic Testing – OITC, AOITC & OINIC

Technician performing OITC acoustic testing of an exterior window assembly

Field measurements of the airborne sound attenuation of installed building façades, exterior walls, windows and doors in accordance with ASTM E966.

On-Site Acoustic Testing performs field testing of building façades and façade elements where the objective is to determine how much outdoor sound is attenuated by the installed construction. Typical test elements include exterior wall assemblies, windows, glazed systems and doors.

ASTM E966 Field Testing

ASTM E966 provides field procedures for measuring outdoor-indoor noise reduction and, under appropriate test conditions, outdoor-indoor or apparent outdoor-indoor transmission loss. Unlike laboratory testing of an isolated specimen, E966 evaluates installed construction under field conditions.

The appropriate measurement method and reported result depend on the façade geometry, test element, outdoor sound field and project objective. Testing may use a controlled loudspeaker source or, for appropriate outdoor-indoor noise-reduction measurements, an existing transportation-noise source.

OITC, AOITC and OINIC

ASTM E966 measurements can be used with ASTM E1332 to develop single-number ratings describing the outdoor-to-indoor acoustical performance of a façade or façade element. Depending on the measurement conditions and method, these can include:

  • OITC / FOITC – Outdoor-Indoor Transmission Class, including the field rating derived from outdoor-indoor transmission-loss measurements.
  • AOITC – Apparent Outdoor-Indoor Transmission Class, derived from apparent outdoor-indoor transmission-loss measurements where field conditions and flanking paths are included in the measured result.
  • OINIC – Outdoor-Indoor Noise Isolation Class, derived from outdoor-indoor noise-reduction measurements and representing the isolation of the receiving space from the specified outdoor sound field.

These ratings are not interchangeable. The appropriate metric is selected according to the project requirements, test geometry and the field conditions that can be established at the site.

Windows, Doors and Complete Façades

Field testing can be useful for verifying installed window and door systems, evaluating exterior wall assemblies, investigating unexpected interior noise, documenting completed construction and comparing measured performance with project criteria. Where an individual façade element is being evaluated, the surrounding construction must provide suitable conditions for a meaningful measurement.

Because incidence angle, flanking transmission and the configuration of the exposed façade can affect field results, OSAT documents the test conditions and selects the E966 procedure appropriate to the installation and the information required by the project.

Testing Elevated Façade Assemblies

OSAT also has battery-powered test equipment that can be operated from a manlift or scaffold when measurements are required at elevated wall, window or façade assemblies. This allows test equipment to be positioned at higher building elevations where practical access is available, rather than limiting field measurements to assemblies accessible from grade.

Related Building Acoustics Testing

Discuss Your Façade Testing Requirements

Contact On-Site Acoustic Testing to discuss the building element, project criteria, site conditions and the ASTM E966 measurement or rating required.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

ASTM E966 Façade, Window and Door Acoustic Testing – OITC, AOITC & OINIC Read More »

Industrial Noise Testing Services

On-Site Acoustic Testing provides independent industrial noise measurement and technical consulting for manufacturing plants, processing facilities, utilities, warehouses, transportation operations, construction environments, and other workplaces where equipment or operational noise must be documented objectively.

Industrial and machinery noise testing

Field measurements can be used to characterize machinery and process noise, identify dominant sources, evaluate employee exposure, document property-line conditions, compare operating modes, and verify the effect of noise-control changes.

  • Machinery and equipment noise measurement
  • Octave-band and one-third-octave-band analysis
  • Source localization and diagnostic testing
  • Before-and-after mitigation measurements
  • Facility and production-area noise surveys
  • Property-line and environmental noise measurements
  • Long-term and remote noise monitoring

Occupational noise and employee exposure

For workplace exposure questions, OSAT can perform area sound-level surveys, personal noise dosimetry, and time-weighted exposure measurements. Testing can support occupational-noise programs, engineering decisions, documentation of changing operating conditions, and investigation of specific employee concerns.

Equipment, process, and product noise

Industrial assignments can range from a single motor, fan, pump, compressor, production machine, or packaged system to a facility-wide investigation. Measurements can also support product development, procurement, acceptance, and verification of manufacturer noise data.

Applicable standards and project criteria

Testing can be developed around OSHA requirements, ASTM, ANSI, ISO, owner criteria, equipment specifications, community-noise limits, or a project-specific measurement protocol. The appropriate method depends on whether the objective is employee exposure, source characterization, environmental impact, product performance, or verification of a stated requirement.

Independent field verification

OSAT does not sell noise-control products or installation work. Our role is to measure actual conditions, identify significant sources and frequency content, document operating conditions, and provide technical findings that can be used for engineering, compliance, troubleshooting, commissioning, or mitigation verification.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Industrial Noise Testing Services Read More »

Workplace and Machinery Vibration Testing

Workplace vibration measurements can document employee exposure, characterize machinery and equipment, and investigate vibration transmitted through floors, structures and occupied spaces.

On-Site Acoustic Testing provides field vibration measurements for industrial, commercial and institutional facilities. Testing can address occupational exposure, equipment-generated vibration, intermittent events and vibration complaints requiring measurements over an extended period.

Hand-Arm and Whole-Body Vibration

Workers can be exposed to vibration through powered tools, machinery, vehicles, platforms and other equipment. The appropriate measurement approach depends on how vibration reaches the worker, the operating conditions and the purpose of the evaluation. Multi-axis measurements can be used where exposure varies with direction or activity.

Machinery and Equipment Vibration

Vibration measurements can also help characterize operating equipment and identify changes associated with imbalance, looseness, rotating components or other mechanical conditions. OSAT can perform real-time measurements and frequency analysis where the vibration spectrum is useful for identifying dominant components.

FFT and Frequency-Spectrum Analysis

FFT and other frequency-domain measurements can separate complex vibration into individual frequency components. This is useful when correlating vibration with machine rotational speeds, harmonics, structural response or other periodic sources. Related acoustic investigations can incorporate noise spectrum analysis.

Long-Term Multi-Axis Vibration Monitoring

When vibration is intermittent or changes with operating cycles, traffic, construction activity or production schedules, long-term and remote monitoring can document how vibration varies over days, weeks, months, or longer. Measurements can then be compared with operating records or event times where appropriate.

Vibration recorder used for long-term vibration monitoring

Noise and Vibration Investigations

Many equipment problems involve both airborne sound and structure-borne vibration. Combined measurements can help determine the dominant transmission mechanism and support practical mitigation decisions. See also our industrial noise, vibration and air-quality testing and noise-control consulting services.

Discuss a Vibration Testing Project

Contact On-Site Acoustic Testing with the equipment or activity involved, operating conditions, affected locations and reason for testing so an appropriate measurement plan can be developed.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

Workplace and Machinery Vibration Testing Read More »

ASTM E1007 AIIC Impact Sound Testing

On-Site Acoustic Testing performs ASTM E1007 field impact-sound testing of installed floor/ceiling assemblies, including Apparent Impact Insulation Class (AIIC) measurements.

ASTM E1007 Impact Sound Testing

ASTM E1007 measures impact sound transmission through floor/ceiling assemblies and their associated supporting structures under field conditions. A standardized tapping machine operates on the floor above while the resulting impact sound is measured in the receiving space.

AIIC characterizes the apparent impact-isolation performance of the installed floor/ceiling assembly and adjacent structure, including the effects of structure-borne flanking paths. The standard also defines additional impact-sound metrics for particular room configurations and project requirements.

Tapping Machine and Measurement Equipment

OSAT uses standardized tapping machines together with precision building-acoustics analyzers to measure the one-third-octave-band impact sound produced in the receiving room. Our current equipment supports field measurements for residential, commercial, institutional and other occupied buildings.

Brüel & Kjær Type 3207 tapping machine used for ASTM E1007 AIIC impact sound testing
Brüel & Kjær Type 3207 tapping machine
NTi Audio XL3 acoustic analyzer used for building acoustics testing
NTi Audio XL3 acoustic analyzer

Flooring, Underlayments and Completed Assemblies

Field impact testing can be used to evaluate completed floor/ceiling construction, compare flooring or underlayment systems, investigate occupant complaints, document existing conditions, and verify performance against project or code criteria. Measurements can be performed on assemblies incorporating hard flooring, resilient finishes, carpet, floating floors and suspended ceilings where applicable.

Because field results include the influence of the installed structure and flanking transmission, they should not be assumed to duplicate laboratory IIC results for a nominally similar assembly.

Related Building Acoustics Testing

Discuss Your Impact Sound Testing Requirements

Contact On-Site Acoustic Testing to discuss the floor/ceiling assembly, project criteria and field impact-sound measurement required.

Please list the city, state/province, and country where testing will take place.
Select all that apply.
Optional. Examples: ASTM, ISO, ANSI, ICD-705, project specification, code requirement, or acceptance criterion.
If yes, only indicate that secure handling is required. Do not submit classified, CUI, export-controlled, or other sensitive information through this form.
List the project criteria and type of testing required, if known (noise survey, dosimetric, AIIC, ASTC, NIC, air quality, etc.)

ASTM E1007 AIIC Impact Sound Testing Read More »