SOUND INSULATION AND ABSORPTION OF TRIMO ELEMENTS

CONTENT ACOUSTICS General information Sound transfer, sound insulation and sound absorption Measured and estimated sound absorption – dLα Trimoterm acoustic panels and particularities Sound insulation of Trimoterm panels Properties of Trimoterm AC acoustic panels Particularities of acoustic panels RESULTS OF MEASUREMENTS OF PANEL SOUND INSULATION Test results of sound insulation (Rw) for FTV panels Test results of sound insulation (Rw) for FTV R and Qbiss One elements Test results of sound insulation (Rw) for SNV panels RESULTS OF MEASUREMENTS OF ACOUSTIC PANELS Test results of sound insulation...

ACOUSTICS GENERAL INFORMATION Sound definition In physics sound is defined as longitudinal waves, which means that particles of a substance in which the sound spreads (gases, liquids, solids) vibrate in the direction of wave travelling. It holds true for longitudinal waves that thickening (contraction) and dilution (decompression) appear in the substance. Contraction appears where particles of the substance come closer and decompression where particles of the substance travel away. The main characteristics of the sound are frequency and amplitude. A frequency unit is hertz (Hz = the number of...

The so-called airborne sound is discussed when the sound source emits sound into a room where the source is located. As a result sound generates waves of partition walls in a room and thus the emission of sound to the neighbouring rooms. Impact sound is discussed when a building structure is excited by walking, moving of furniture etc. where waves of bordering partition walls of a room are excited and these then emit sound to the neighbouring rooms. Sound insulation is of vital importance for health and well-being of people. It is especially important in house building and in facilities for special...

1- Sound source 2- Test piece 3- Sound meter Fig. 2: Test procedure for definition of sound insulation in compliance with EN ISO 140-3:1997 1 – Echo chamber 2 – Sound source 3 – Test piece 4 – Sound insulation meter Fig. 3: Testing equipment – measuring of sound absorption in compliance with EN 20354:1998 General Use | EN | Version 1.1 | January

OTHER TERMS (Rw, Rw´, dLα, dB, dBA,…) Decibel dB, dBA Decibél (abbreviation dB) is a unit without any dimension and it is used for expressing a relation between a changeable quantity and fixed reference. dBA is the unit used for weighted measurements with the factor. Sound insulation Rw The so-called evaluated minimal value of sound insulation before sound in the air of partition walls and mezzanine structures defined by Rw (measured in a laboratory) or the value Rw’ (measured in the facility) is used in practice instead of the sound insulation R. The value Rw is supplemented by the following...

Measured and estimated sound absorption – dLα Absorption (dLα) for the measured panel sample laid in an echo chamber is defined on the basis of the formula: WHERE: Li – are factors taking into account the frequency spectrum of road traffic under consideration of the correction in accordance with the correction curve A αsi – are co-efficients of sound absorption in third frequency band established by measurements General Use | EN | Version 1.1 | January 2

TRIMOTERM ACOUSTIC PANELS AND PARTICULARITIES Sound insulation of Trimoterm panels Characteristic co-efficients of sound insulation Rw for the type of construction with sandwich panels depend on fillers and thickness of panels/panel weight in the range from 20 dB to 35 dB. For panels with mineral wool it usually amounts to 30-35 dB. Multi-layer structures are needed in case of more demanding requirements, some them are presented in the following sections. There are various penetrations, openings in walls, joints over which sound spreads differently as over a panel. Therefore architects / design...

Types of panel performance The following types of acoustic panels can be performed: Types of profiles / sheet metal thickness: Outer shell of façade panels: - m, s, v; sheet metal thickness tn = 0.6 mm, (0.7 mm) Outer shell of a roof panel: TS; sheet metal thickness tn = 0.6 mm, (0.7 mm) Inside of façade / roof panels: s, v; sheet metal thickness tn = 0.6 mm Profiled sheet metal, perforation RT Ø4 x 8 Apf = 22% Fig. 5: Types of Trimoterm acoustic panels General Use | EN | Version 1.1 | January

Complete marking of an order (an example): FTV 100 gs – ac* - 9006/9002** - 0.6 PVDF / 0.6 SP25 gs…profile smooth (externally), standard (internally) 9006…RAL external paint protection 9002…RAL internal paint protection 0.6 PVDF… sheet metal thickness and material of paint protection 0.6 SP25… sheet metal thickness and thickness of a paint protection layer * ac- acoustic panel *- internal perforated sheet metal is possible only in colour RAL 9002 and SP25 polyester paint protection Acoustic properties of the Trimoterm AC panel Sound insulation and sound absorption of a Trimoterm AC panel Properties...

Fig. 6: The co-efficient of sound absorption αs Trimoterm FTV 60 - ac. (Test report No. P 526/ 05-510-2 - ZAG Ljubljana) The evaluated co-efficient of sound absorption αw = 0.85 Sound insulation of a panel in compliance with standard SIST EN ISO 717 (evaluated in accordance with this standard) reaches 34 dB, sound absorption in compliance with standard EN 20354 reaches 8.3 dB. On the basis of technical-acoustic properties of large thickness types we declare that the panels of large thickness types (80 to 240 mm) reach the same or better results of sound insulation and sound absorption. General...

Particularities of acoustic panels Combustibility The response of Trimoterm AC panels to fire has been tested in compliance with standard SIST EN 13823. In compliance with standard SIST EN 13501-1 Trimoterm AC panels reach classification relating to response to fire B-s1,d0. Load-bearing capacity of acoustic panels Tables of permissible distance for Trimoterm panels are not valid for Trimoterm AC acoustic panels. Due to the perforation and thus weakening of sheet metal the permissible distances are slightly shorter. Trimo needs to make exact case calculation. The following data are needed for...