Services for our international clients:

We are pleased to offer testing services (noise, vibration, sound level, indoor air and light quality) throughout the world to a variety of worldwide standards including:

  • ISO
  • ASTM
  • IEC
  • ECMA
  • ANSI
  • DIS
  • EN
  • JIS among others

We provide testing in all of  Europe, St. Kitts, Virgin Islands, Bahrain, UAE, Dubai, Singapore, Korea, Taiwan, Japan, Australia and New Zealand among others. We do not currently provide service in Mexico.

We have a large library of relevant technical documents, and can complete your project to the governmental and regulatory standards in your region or country. Please contact us with your specific requirements for a service quotation.

International clients may contact us via email, or by calling +1-802-233-8700.

Expert Witness Testimony (and other services for attorneys and insurance companies)

We offer a wide variety of services which are of particular interest to attorneys, insurance companies, and other individuals who may be involved in ongoing (or immanent) legal action. On-Site Acoustic Testing will provide you with the documented proof that is required to ascertain whether sound or noise levels are in compliance with local, state, or nation regulations. We have provided expert witness testimony in state environmental and civil proceedings. Contact us today to find out how we can assist you in your particular situation.

Email us at:

Talk to us toll free: 1-800-665-0080

Indoor Air Quality Testing

Indoor air quality is one of those things that people just don’t spend very much time thinking about…at least until their family or employees start getting sick. While there is more awareness in the manufacturing/industrial world, it’s our opinion that there is still a lack of awareness concerning this important issue. That said, the problems are many times magnified when talking about multi-unit dwellings!

On-Site Acoustic testing can provide indoor air quality testing services for the following agents (and to ASTM/ISO/ANSI standards):

  • Temperature
  • Humidity
  • Carbon Dioxide
  • Carbon Monoxide
  • Mold and other bacteria
  • Particulate Matter and other dust
  • Pathogens (Organic)
  • Pharmaceutical agents
  • Organic chemicals
  • NH3
  • CO
  • HCN
  • H2S
  • NO
  • NO2
  • SO2
  • Chrome
  • Lead
  • Phthalates
  • Silica
  • Stainless Steel
  • Iron
  • Mild Steels
  • Solvents

Our expert engineers will develop an individualized profile to first and foremost make sure that the problem is fully diagnosed. Often this can be accomplished relatively quickly via a single day broad spectrum sampling session, followed by submission to one of the regional ISO certified labs we utilize for sample analysis. In other cases, a more detailed approach may be necessary, which could include partial wall dis-assembly, robotic sample collection (for inaccessible duct work), and flooring removal.

After the analysis has been completed, we will develop a treatment protocol that will neutralize the contamination issues and render the treated areas much less susceptible to future recurrence of contamination.

Contact us using the convenient form below:

Or contact us today at 1-800-665-0080 to find out how we can help!

FSTC / ASTC Field Sound Transmission Class testing services / Apparent Sound Transmission Class – ASTM E336 – 18

FSTC (ASTC) Testing Services –Field / Apparent Sound Transmission Class Tests

FSTC (ASTC), or as it’s formally known Field / Apparent Sound Transmission Class is a double digit number that refers to the sound transmission properties of a wall structure. It may also be applied to measure the sound transmission properties of a window or door unit. Virtually all states and municipalities have set guidelines for the minimum FSTC / ASTC test rating that a building may have, and it’s a vital part of the International Building Code.  It’s not at all uncommon to find well-above-minimum FSTC / ASTC  test (and related FIIC / AIIC) ratings inserted into requests for proposals from architects and other designers especially for luxury housing. The most common standards for testing in the United States include the ASTM E90, ASTM E336 and ASTM E413 standards, while in European Union countries the ISO 140 and ISO 717 standards are used.

Performing a FSTC / ASTC test requires some specialized equipment, the first being an omni-directional sound source. This just means a sound source (speaker) that radiates sound in all directions equally, quite unlike a typical speaker which radiates most of its sound to the front. This ensures that the room is equally driven by sound pressure in all directions. Typically this is achieved by utilizing a multi-driver speaker systems that resembles a large soccer ball…think of each of the black sections as a speaker! The Bruel & Kjaer 4292 speaker is probably the best known of the current crop of omni-directional sound sources, and our personal reference unit. This unit is placed in what is called the sending room and then switched on, in order to excite the wall structure (and other structures that comprise the room) so that the resultant noise may be measured on the other side.

Secondarily, a sound level analyzer is required to accurately measure the sound in the room on the other side, which is named the receiving room. We utilize a  Bruel & Kjaer 2260 and 2270  sound level/analyzer meters running building acoustics software BZ 7204 and BZ 7229 which is capable of providing results compliant with ASTM, ISO, DIN, BS, and NBE among others.

We provide commercial and residential tenants, building managers, architects, contractors, insurance companies, and governmental agencies STC testing services and  ratings for any building. Call us today to talk about your noise transmission sound problems.

Contact us at 1-800-665-0080 to speak with a consultant today, or email us at:

Before you purchase that new house or condominium…

Over the past 20 years, it’s been increasingly common for home buyers to enlist the services of a home inspector. In fact, many banks make home inspection a precondition that must be met as a part of the loan process! All of the major mechanical systems of the home or condominium should be inspected for quality and functionality, and the overall “fitness” of the building should be assessed. Even if you are just considering renting an apartment for a yearly lease, you should give consideration to having that apartment tested for both noise transmission and ambient noise within the space…if your sleep and overall well-being is important to you!

Interestingly, little or no thought is given to issues relating to noise and vibration pollution, in addition to indoor air quality. All structures will have some degree of noise transmission from the inside of the house to the world outside, and more importantly, from the world outside to the living spaces inside! Additionally, mechanical systems such as heating/cooling, and plumbing, within the house can have a surprising sonic footprint when they’re in operation.

As in many other aspects of life, the best time to ensure that your property is built with attention to noise and noise pollution issues, is BEFORE the structure is built. When we work in conjunction with your architect or general contractor, we’re able to provide the most value for your investment and provide the highest performance with the least visual intrusion.

Of course, it’s not always possible to be involved in the genesis of a building project, and most people prefer to purchase a dwelling that has already been built. That’s where we come in! We can evaluate the current noise levels and spectrum, point out to you any deficiencies that the structure may have, and give you a ballpark (or detailed) description of how the noise issues can be corrected.

Numerous studies have found links between noise exposure and stress related physical and emotional ailments, noise, vibration and indoor air quality issues can be more than just a petty irritant!

Contact us today to talk with a consultant about your prospective purchase.

Email us at:

Talk to us toll free: 1-800-665-0080

Chat with us using the window to the right –>

ISO 4871 – Noise Emission Values of Machinery

If you are a manufacturer producing items for export to the EU and/or the middle east, chances are you will need to have your equipment tested to ISO 4871 standards. The 4781 standard is the noise declaration that a manufacturer must include with certain devices, in order to warn users what the noise output of the device will be during usage. Specific guidelines have been set which allow for the determination of the statistical validity (or stated another way, uncertainty) of the measurements, based upon number of samples tested and the accuracy of the testing equipment.

ISO 4871 directly references ISO 3740 which lays out the standard protocol for the measurement of noise emission. Additionally, ISO 7574 is referenced which gives the proper procedures for the verification of the sampling procedure utilized for the measurement and analysis.

On-Site Acoustic Testing will provide your organization with the testing required for including valid Noise Declarations with your equipment. Whether it be equipment destined for export, in-situ measurement at the end user’s location, or measurements to be conducted at our location, we will be pleased to provide you with a prompt quotation for the services you require.

Contact us at 1-800-665-0080 to speak with a consultant today, or email us at:

Acoustic Testing for Schools

On-Site Acoustic Testing offers a full range of testing and design services for schools of all kinds:

  • Noise and vibration testing for classrooms, media labs, gymnasiums, and dining halls
  • Acoustic testing for auditoriums and other performance spaces
  • Consultation and design of paging systems and video monitoring
  • Design services for media labs and other audio-video systems
  • Development of distance learning infrastructure
  • Noise abatement services for all areas of the physical plant

We offer services to elementary and high schools, colleges, universities and vocational/trade schools.

Email us at:

Talk to us toll free: 1-800-665-0080

OSHA Hearing Conservation Programs

If you are the individual in your company that is responsible for ensuring compliance with OSHA’s regulations, you already understand the importance of having your employees hearing regularly checked, and dutifully documented. You’re also aware that there are many options when it comes to having annual (or biannual) hearing tests for your employees.

On-Site Acoustic Testing can provide hearing tests for your employees, and help you set up a hearing conservation program, according to OSHA guidelines, if you’re not yet fully up to speed. On the other hand, if you already have a hearing conservation program in place, and have been contracting a third party provider to perform hearing tests, we can provide the training and equipment necessary for you to bring testing in house…resulting in significant savings over the long term.

Email us at:

Talk to us toll free: 1-800-665-0080

Contact us today to talk about your requirements!

Just how “on-site” are we?

We regularly work with clients to provide acoustic testing, sound level testing, noise monitoring, employee dosimeter test protocol,  STC, IIC, vibration, air quality, and light intensity tests according to ASTM, ISO, and other standards, in the following places:

  • Alabama: AL
  • Alaska: AK
  • Arizona: AZ
  • Arkansas: AR
  • California: CA
  • Colorado: CO
  • Connecticut: CT
  • Delaware: DE
  • Florida: FL
  • Georgia: GA
  • Hawaii: HI
  • Idaho: ID
  • Illinois: IL
  • Indiana: IN
  • Iowa: IA
  • Kansas: KS
  • Kentucky: KY
  • Louisiana: LA
  • Maine: ME
  • Maryland: MD
  • Massachusetts: MA
  • Michigan: MI
  • Minnesota: MN
  • Mississippi: MS
  • Missouri: MO
  • Montana: MT
  • Nebraska: NE
  • Nevada: NV
  • New Hampshire: NH
  • New Jersey: NJ
  • New Mexico: NM
  • New York: NY
  • North Carolina: NC
  • North Dakota: ND
  • Ohio: OH
  • Oklahoma: OK
  • Oregon: OR
  • Pennsylvania: PA
  • Puerto Rico: PR
  • Rhode Island: RI
  • South Carolina: SC
  • South Dakota: SD
  • Tennessee: TN
  • Texas: TX
  • Utah: UT
  • Vermont: VT
  • Virginia: VA
  • Washington: WA
  • West Virginia: WV
  • Wisconsin: WI
  • Wyoming: WY
  • Netherlands
  • Germany
  • United Kingdom
  • China
  • Hong Kong
  • Japan
  • Singapore
  • Taiwan
  • Poland
  • Dubai
  • Abu Dhabi
  • Kuwait
  • Oman
  • Jordan
  • UAE

Please ask about emergency “next-day” service, for the most pressing noise-related situations.

Email us at:

Talk to us toll free: 1-800-665-0080

UAE & Dubai Directory. We are listed under Science and Environment category

Soundproofing FAQ

Every time we hear the word “soundproofing” we have to take a moment to step back and think about what people actually mean when they say it.
As with most things in life, soundproofing is one of those nebulous terms that can mean different things to different people. Perhaps most appropriately, soundproofing has a different level of meaning (and urgency) to the party that is creating the noise than to the party being disturbed by it!

Additionally, soundproofing a building (be it commercial, industrial, or residential) is subject to the law of diminishing returns. There is a theoretical point that can be arrived at where further increases in materials or labor expended in applying those materials to a building, will cease to provide any subjective benefit.

On-Site Acoustic testing specializes in finding the correct balance where performance and real world budgets coincide. Using specialized building acoustics software (running on dedicated specialist hardware) we first pinpoint the exact frequencies where sound and noise transmission are occurring. Next, we isolate deficiencies within the building that are allowing for the sound and noise transmission. Only then are we able to develop effective strategies for eliminating the noise transmission problems.

More information is available on this website concerning actual testing methods and testing standards.

Contact us today at 1-800-665-0080 to find out more about testing and treatment designed specifically for your application.