<https://www.noise-and-vibration.co.uk/products/rion-vm-240a-acoustical-volume-meter/#webpage>
<http://schema.org/description>
"The Rion VM-240A Acoustical Volume Meter enables the rapid, accurate and non-invasive measurement of the volume of irregular shapes."
<https://www.noise-and-vibration.co.uk/products/rion-vm-240a-acoustical-volume-meter/>