Mecanum’s ultrasonic tortuosity meter (or ultrasonic refractometer) is designed to obtain measurements of the tortuosity and characteristic parameter of a wide range of porous materials commonly used in noise monitoring. The system uses transmission and reflection methods: transmission method is suitable for materials with low resistivity, while reflection method is more suitable for more resistive materials (requires porosity as an input parameter).

Available in 1 gas or 2 gas (slightly different measured properties).

Main Advantages

Why Choose Mecanum’s Tortuosity Meter?


State-of-the-art measurement method taken from scientific litterature


Highly advanced signal processing and technology integrated into a simple and user-friendly interface


Automatic calculation of global statistics
Advanced calculation algorithms

What’s Included With Your Tortuosity Meter

Discover What You Will Find In The Box!

Transmission test bench
Reflection test bench
High frequency acquisition and transmission system
High frequency amplifier
TOR-X measurement software


One Instrument, Multiple Uses


Ensure your quality is maintained to meet the standards important for you


Generate new knowledge or new technologies through an efficient R&D


Supply data to the models used in multiple acoustic prediction software!

Measured Properties

Discover What Your Tortuosity Meter Can Do for You!


Equivalent Lenght


Viscous characteristic length

Thermal characteristic length

Accessories for Your Tortuosity Meter

We Have The Perfect Accessory To Suit Every Need!

Circular Knives

Allow better control of the samples geometry of your porous materials

Material Slicers

Hold a porous sample in place, providing better control of its geometry

Weather Station

Allows to measure the air atmospheric conditions


Extract multiple acoustic parameters thanks to FOAM-X software


Simulate multilayer acoustic materials thanks to NOVA software

Interested? Ask for Your Free Quote!