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Olson Instruments, Nondestructive Testing Equipment, Nondestructive Evaluation, Olsen | Testing Infrastructure Nondestructively

July 22, 2018

Check Out Olson's New


Affordable Foundation Test Gauge


NDT System Add-On — Multiple Impact Surface Waves

USA Sales: 303.423.1212          International Sales: Click here for Map

Multiple Impact Surface Waves

click here for data examples[+]
Base Model:
MISW-SL-1 [test Single Layers]

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Scroll down to see a list of Available Models and Key Features for the Multiple Impact Surface Waves test method add-on.

Save money! Contact Olson Instruments when adding on to an existing system, or purchasing multiple systems as some of the components are common to other test methods.


MISW investigations are used in QA or forensic investigation of subgrade, base & top asphalt/concrete pavement layers as well as for structures & tunnels.

The Multiple Impact Surface Waves (MISW) systems are designed to measure asphalt and concrete pavement surface layer (Single Layer software) thicknesses to within ~0.2 to 0.4 inches (~5 to 10 mm) when calibrated with limited cores. In addition, the MISW system can be used to measure surface wave velocity profiles vs. depth from which Young’s (elastic) moduli and layer thicknesses are determined (Single Layer and Multiple Layer software options) the pavement layer thickness/moduli profile is used for mechanistic-empirical pavement design and rehabilitation studies. The MISW system can be used for Quality Assurance/Quality Control (QA/QC) purposes for each layer of a pavement system during construction to provide pavement system layer thickness (typically surface pavement layer) and moduli data (for pavement, base, and subgrade layers). In pavement rehabilitation projects, MISW can be used to measure asphalt/concrete thickness/moduli as well as the thickness/moduli of the underlying base, and subgrade layers of pavement systems.

The MISW test method utilizes many of the same principles, equations, and data collection procedures as the SASW method. The differences between the two methods are predominantly in the data collection and processing where, the MISW method is based on multichannel data processing techniques, developed for the Multichannel Analysis of Surface Waves (MASW) method. All of the data taken during MISW testing is analyzed together to create a dispersion image or phase velocity spectrum.

Freedom Data PC, NDE 360 Required,
Sold Separately
Freedom Data PC
NDE 360


Hands-on training is available for the Multiple Impact Surface Waves Nondestructive Testing Method at our Wheat Ridge, Colorado (USA) location, which is a suburb located appromately 15 minutes northwest of downtown Denver. Training may be available at your location by one of our agents upon special arrangement.

For complete details about the Impact Echo system available as an add-on test with the Freedom Data PC or NDE 360 platform, call toll free 1-888-423-1214 or email:



Applicable On:

  • Asphalt
  • Base
  • Concrete
  • Rock
  • Subbase
  • Subgrade Soil

Test For:

  • Layer Shear Moduli
  • Layer Poisson’s Ratio
  • Layer Thickness
  • Layer Young’s (Elastic) Moduli

Meets ASTM:

  • N/A

Meets ACI:

  • N/A


All of Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineering, world reknowned for NDT consulting. The OE Website is loaded with Tech Brief and project photos using the equipment shown on this website. Purchase our products to “do-it-yourself”, or hire an Olson Engineering Nondestructive Testing professional for your next project