Manufacturer

Natural Acoustic

Natural Acoustic

Natural Acoustic is a Tyrolean manufacturer of sound absorbers made from natural fibres, based in Mutters near Innsbruck. The main materials are sheep's wool, hemp, flax and wood fibre. The company provides reverberation measurement, planning and installation from a single source. The range includes acoustic panels, ceiling rafts and baffles made from hemp, hemp absorbers with flax fleece, sheep's wool and wood fibre absorbers, and the FRAMY frame absorbers for use as wall absorbers, room dividers or partitions. It also covers bass traps, wool room dividers, acoustic pictures and meeting pods. Areas of use are offices, hotels, restaurants and public buildings.

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Hemp Absorber with Flax Fleece

Natural Acoustic Hemp Absorber with Flax Fleece

WallCeiling

Description

Wall and ceiling panel made of Austrian industrial hemp and flax with a natural flax fleece surface.

Technical data

Material: Hemp insulation with Tyrolean sheep wool absorber felt and a flax fleece top layer
Surface: Natural flax fleece, with alpine hay, with alpine hay and flowers, or with skeleton leaves; flax fleece flame-retardant B-s1,d0
Up to fire class: E (EN 13501-1) for the absorber core
Certifications: Flax fleece STANDARD 100 by OEKO-TEX (16.0.90034)

Measurement data

Sound absorption

ISO 354 – reverberation chamber

αw
1.00

Frequency values

αp per ISO 11654

f (Hz)1252505001k2k4k
αp0.250.751.001.000.950.90

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SizeGap / cavityValue
53 mm0 mm (direct mounting)αw1.00

Absorber class: A

Institute: Acoustics laboratory of Fuchs Raumingenieure, Nuremberg

Measurement date: 03/12/2024

Room volume: 391.6 m³

Object area: 12 m²

Terms of use
Measured values as a table (1 measurement)
Hemp Absorber with Flax Fleece: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-upαwAbsorber class100 Hz125 Hz160 Hz200 Hz250 Hz315 Hz400 Hz500 Hz630 Hz800 Hz1000 Hz1250 Hz1600 Hz2000 Hz2500 Hz3150 Hz4000 Hz5000 Hz
53 mm · 0 mm (direct mounting)1.00A0.130.230.360.540.740.931.101.111.091.061.020.990.960.940.940.930.870.83
Measured values as a table (1 measurement)

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