Comment from the engineer on the acoustic qualities of hemp
"Its own, a shiny hair, not bad at all, very pleasant to work, and above all!
unwanted low resonances ".
Guy Roots: "I just rediscovered my instructors in this isolated hemp brick studio.
more angle effect, mate without ever being deaf .. a good foot to take and mix the sound! "
am very happy to have these bricks, the participants of the yoga class
are also, happily surprised by the atmosphere
that emerges from the room. we must also specify
that hemp also has a good thermal quality. With 20 cm of cellular concrete
and the 10 blocks of hemp, I can get 17 ° without additional heating.
Knowing that I heat the room next to the wood and the door remains open.That's always happy with the result and one last thing,
the pose is easy and that's great.
| The sound
absorption α is measured using
called 'kundt tube', the density of the HESTIA block is
too low for the material to achieve a sound
effect, it would rather tend to transmit the waves by
However, this material has a high open porosity, the emitted wave penetrates into the material and amortizes along the capillaries by viscous effects this explains these unique qualities of absorption of waves.
insulation test of a hemp brick insulation 'Hestia isolation' in two
identical rooms of 9 m² a floor carpet nothing on the ceiling
single angle of one piece covered with hemp brick and in the other
nothing , a speaker and a microphone to send and retrieve the sound of
a music, a person moves from one room to another while reading a text
to make you hear the difference of the sound of his voice, listened if
possible with good speaker or
Hemp brick sold by m²
Price: 38 Euros the m²
available: avignon 84000 france
contact: zero six 51 33 84 96
4 bricks per m² format 35cm / 70 cm / thickness 10 cm weight 6.5 K to 7K brick = 260 to 280 K per m3 real!