3.6 x 3.0 m test floor area
Test specimen, planks on concrete floor. Description:
"Soundless" LVT Planks with foam rubber backing, 4.7 mm thick (overall) laid on a 200 mm thick concrete floor.
Materials:
a] "Soundless" LVT Planks, with a 0.5 mm clear wear layer with woodgrain texture, over a decorative film printed with a timber appearance, over a vinyl substrate, with a 1.5 mm foam rubber composite backing. Overall thickness: 4.7 mm. Weight: 7.7 kg/m2. Plank size: 1219.2 x 177.8 mm as tested (also available in 1219.5 x 228.6 mm – not tested).
b] Pressure sensitive flooring adhesive (not named, at client’s request).
c] 200 mm thick concrete test floor of laboratory (approx. 480 kg/m2); no ceiling below.
Installation details:
The concrete test floor of the laboratory was swept clean. Pressure sensitive adhesive [item b] was applied to the back of the LVT planks [item a], and allowed to dry until clear (the milky appearance when wet, having cleared). The LVT planks were then laid hard-up against each other on the concrete sub floor without gaps, and trampled underfoot to establish intimate contact with the concrete. Installation was carried out by the client.
Measurement Details & Results
Freq (Hz) Specimen Floor Bare Concrete
Ln (dB) Floor Ln,0 (dB)
100 61.6 62.5
The concrete test floor, being 200 mm thick, is not suitable for testing in accordance with AS ISO 140.8; hence ΔL values are not reported. Impact noise figures for the bare concrete floor have been measured at another time, and are included for information only.
125 64.4 66.4
160 64.8 69.2
200 64.9 67.6
250 63.8 67.0
315 65.0 68.1
400 64.6 67.3
500 63.8 67.9
630 63.0 67.9
800 63.0 69.1
1000 60.8 70.0
1250 57.1 70.3
1600 51.0 70.4
2000 41.2 70.2
2500 34.2 70.2
3150 27.5 69.8
4000 22.4 68.9
5000 19.1 67.1
Performance Index Numbers (laboratory method)
Measurement Conditions With Floor Covering
Bare Concrete Floor
Ln,w (CI) = 61 (-2)
The tapping machine was placed diagonally in eight different locations across the test floor area; sound levels in the room below were measured over a whole microphone rotation (33 sec) at each location, and the results averaged.
Date of measurement: 24 November 2016
24 November 2016
IIC = 49
On top of floor:
14 °C, 71 % R.H.
18 °C, 55 % R.H.
Chamber underneath floor:
17 °C, 64 % R.H.
17 °C, 61 % R.H.
Atmospheric pressure:
1007 mBar
1005 mBar
Notes, Deviations etc
5. Testing was carried out unloaded; the weight of the tapping machine being the only load on top of the floor.
6. Physical characteristics given for materials may be as per supplier’s advice; not necessarily verified by CSIRO.
7. The client advises that “Soundless” is also available in 228.6 mm width; otherwise identical in all respects.
8. The test specimen material suffered no visible damage during the course of the test.
Issuing Authority
1. ≤ signifies results, if any, where measurement was limited by proximity to background level.
2. Ln = dB re 20µPa, corrected to mean sea level pressure.
3. Ln results represent noise levels; i.e. lower = quieter. For IIC results, higher = quieter.
4. IIC has been calculated according to ASTM E989-89; laboratory requirements for which may differ from those of the AS ISO 140.6 standard.
Signed: David Truett
Date: 9 August 2017
Acoustic Instrumentation
Laboratory Construction
Real time analyser: Brüel & Kjær PULSE LAN-XI type 3160-A-4/2
Microphone/preamp: Brüel & Kjær type 4166 microphone on type 2669 preamp, rotating continuously with 33 sec period about 1.65 m radius.
Noise source: Brüel & Kjær type 3204 tapping machine (complies with ISO 140)
Calibration: Brüel & Kjær type 4228 Pistonphone: Feb 2016 (NATA cal)
Analyser: Feb 2016 (NATA cal)
Sensitivity of measurement system was calibrated against the pistonphone at the time of measurement.
Chamber:
Diffusers: 20 stationary diffusers (approx 40 m2).
Test floor:
300 mm thick concrete
parallelepiped with dimensional proportions 1:1.3:1.6 for uniform distribution of room modes
room volume approx 200 m3
room surface area approx. 212 m2.
The roof area of the reverberation chamber was constructed with a 200 mm thick area (3.60 x 3.00 m) for use as a floor test area. The test floor and the surrounding concrete roof of the chamber form a single monolithic structure.
0
10
20
30
40
50
60
70
80
125
250
500
1000
2000
4000 Hz
(Slab with Floor Covering)
(Bare concrete floor)
61 Reference Line
