IMPACT NOISE TESTING TIMBER FLOORING & ACOUSTIC UNDERLAY TESTING SCHNEID FLOORING AUSTRALIA PTY LTD

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1 IMPACT NOISE TESTING TIMBER FLOORING & ACOUSTIC UNDERLAY TESTING SCHNEID FLOORING AUSTRALIA PTY LTD Date: Monday, th May 5 File Reference: 76C55mfcSchneidingAustralia Koikas Acoustics Pty Ltd Commercial, Unit 7, Forest Road, Bexley NSW 7 Date: th May 5 Reference: 76C55mfcSchneidingAustralia

2 DOCUMENT CONTROL Project Title Impact Noise Testing Timber ing & Acoustic Underlay Testing Schneid ing Australia Pty Ltd Our Project Number 77 Our File Reference File Link 76C55mfcSchneidingAustralia Z:\ACOUSTICS\ACOUSTICS 5\Compliance\Partition Testing Impact\76C55mfcSchneidingAustralia.docx Revision V /5/5 Prepared By Approved By Michael Fan Chiang Nick Koikas Client Schneid ing Australia Pty Ltd Attention: William Yu w.yu@schneidflooring.com.au The information contained herein should not be reproduced except in full. The information provided in this report relates to acoustic matters only. Supplementary advice should be sought for other matters relating to construction, design, structural, fire-rating, water proofing, and the likes. Date: th May 5 Reference: 76C55mfcSchneidingAustralia

3 IMPACT NOISE TESTING TIMBER FLOORING & ACOUSTIC UNDERLAY TESTING SCHNEID FLOORING AUSTRALIA PTY LTD CONTENTS. CONSULTANT'S BRIEF TESTING SAMPLES AND CONDITIONS IMPACT NOISE CRITERION BCA REQUIREMENT AAAC STAR RATING PERFORMANCE REQUIREMENTS IMPACT NOISE TESTING ASSESSMENT PROCEDURES AMBIENT BACKGROUND NOISE MEASUREMENT REVERBERATION TIME MEASUREMENTS INSTRUMENTATION AND CALIBRATION MEASURED RESULTS CONCLUSION... Appendix A - Performance Graphs and Calculations Date: th May 5 Reference: 76C55mfcSchneidingAustralia 3

4 IMPACT NOISE TESTING TIMBER FLOORING & ACOUSTIC UNDERLAY TESTING SCHNEID FLOORING AUSTRALIA PTY LTD. CONSULTANT'S BRIEF Koikas Acoustics was requested by Schneid ing Australia Pty Ltd to conduct impact noise tests on four (4) different timber floor systems. Impact noise tests were conducted with one type of timber flooring on four (4) different underlays. Testing was undertaken between two sole occupancy units in Campsie. The aim of the test was to calculate the impact isolation performance of the timber flooring used in conjunction with four (4) different underlays. Test results were compared to the acoustics requirements of Part F5 of BCA (Building Codes of Australia) and the standards prescribed by the Association of Australian Acoustical Consultants (AAAC). Date: th May 5 Reference: 76C55mfcSchneidingAustralia 4

5 . TESTING SAMPLES AND CONDITIONS Koikas Acoustics has been advised that the ceiling/floor system between the living/dining/kitchen areas of residential units is constructed with following building materials: Living/Dining/Kitchen Areas mm thick concrete slab; Approximately 8 mm deep suspended ceiling cavity; 5 mm thick insulation batts, and 3 mm thick plasterboard ceiling. Hereafter is referred to as the existing ceiling/floor system ECFS. The tests were conducted on the existing ceiling/floor system (ECFS) with the following timber flooring and acoustic underlays: Test : mm KSP Lignified ing over mm Rubber Underlay with Silver Foil Test : mm KSP Lignified ing over 3.5 mm Standard IXPE Underlay (Light Green) Test 3: mm KSP Lignified ing over mm HD IXPE (Green) Test 4: mm KSP Lignified ing over mm ST standard IXPE (White) Date: th May 5 Reference: 76C55mfcSchneidingAustralia 5

6 3. IMPACT NOISE CRITERION 3. BCA REQUIREMENT In accordance with current BCA, a floor in a Class or 3 building must have an D ntw +C tr (airborne) not less than 45 and an L ntw +Ci (impact) not more than 6 if it separates- (i) (ii) sole-occupancy units; or a sole-occupancy unit from a plant room, lift shaft, stairway, public corridor, public lobby or the like, or parts of a different classification. 3. AAAC STAR RATING PERFORMANCE REQUIREMENTS Reproduced from the AAAC Guideline for Apartment and Townhouse Acoustic Ratings, the following Table (Section C) describes the acoustic ratings with reference to the Star Rating System. Table. Star Rating requirements for Inter-tenancy Activities Published by the AAAC INTER-TENANCY ACTIVITIES Star 3 Star 4 Star 5 Star 6 Star (a) Airborne sound insulation for walls and floors - Between separate tenancies DnTw + Ctr Between a lobby/corridor & bedroom DnTw + Ctr Between a lobby/corridor & living area DnTw + Ctr (b) Corridor, foyer to living space via door(s) DnTw (c) Impact isolation of floors - Between tenancies LnTw Between all other spaces & tenancies LnTw (d) Impact isolation of walls - Between tenancies No Yes Yes Yes Yes - Between common areas & tenancies No No No Yes Yes Date: th May 5 Reference: 76C55mfcSchneidingAustralia 6

7 4. IMPACT NOISE TESTING The testing of the ceiling/floor system with the mm KSP Lignified ing and four (4) different underlays were conducted inside the unfurnished living/dining/kitchen spaces from one residential unit (upper floor level) to another unit (lower floor level) directly below within a residential building in Campsie on Thursday 7 th May ASSESSMENT PROCEDURES Spectrum sound level measurements of transmitted impact noise were recorded in /3 octave band centre frequencies between 5 and, Hertz. A standardised BSWA Technology Co. Type TM S/N 4454 Tapping Machine was used to generate the sound field in the source rooms for the impact noise test. Impact noise measurements were carried out in accordance with the recommendations of AS/NZS ISO 4.7:6 Field measurements of impact sound insulation of floors. This document provides information on appropriate measurement equipment and the proper implementation of measurement practices so as to achieve reliable results of impact sound insulation between rooms in buildings. For determining a single number quantity for impact sound insulation between rooms in buildings when measurements are conducted in-situ, L nt,w + Ci (weighted standardised impact sound pressure level + spectrum adaptation term), the relevant standard is AS/NZS ISO Impact sound insulation. The calculated L nt,w + Ci derived from applying the formulae in this standard allows for a comparison between these calculated levels and the nominated acceptable levels outlined in the Verification Methods of the Building Code of Australia (BCA). 4. AMBIENT BACKGROUND NOISE MEASUREMENT A measure of the underlying ambient noise was taken in the receiving rooms to account for the perceived noise floor in the space. Inaccuracies in the measurements and calculations can occur in areas of high ambient noise however the location of the site and receiver rooms meant little ambient noise was evident in this case. Ambient noise levels in each /3 octave frequency bands were measured to take into account the effect of ambient noise during the recording of the transmitted impact noise levels. Date: th May 5 Reference: 76C55mfcSchneidingAustralia 7

8 4.3 REVERBERATION TIME MEASUREMENTS To determine the L nt,w + Ci or L nw, reverberation time measurements need to be performed in the receiving rooms. The reverberation time in the receiver room is calculated to standardise the airborne/impact noise transmission measurements to reference reverberation time of.5 seconds as required by AS/NZS ISO 4.7:6 Section 3.4, and AS ISO Section 3.4. Reverberation time measurements were conducted using the balloon source method. This consisted of bursting a large balloon and measuring the decay of sound pressure level using a spectrum analyser. This transient response was analysed by the sound level meter and a measure of the reverberation time in /3 octave bands was used to calculate the standardised impact noise rating. 4.4 INSTRUMENTATION AND CALIBRATION NTi XL Type Approved (TA) precision spectrum analyser S/N AA-63-E was used to measure the impact noise levels. The equipment used for taking noise level measurements is traceable to NATA certification. Field calibrations were taken before and after the measurements with a NATA calibrated field calibrator. There was no system drifts. Date: th May 5 Reference: 76C55mfcSchneidingAustralia 8

9 5. MEASURED RESULTS The results of the impact noise test is summarised in Table Below. Table. Impact Noise Insulation Performance Summary Testing Samples L ntw, (Ci) BCA Criterion AAAC Star Rating FIIC Improvement in Acoustic Rating L ntw Test : ECFS 6 (-) N/A 4 - Test Ceiling/ System: mm KSP Lignified ing mm Rubber Underlay with Silver Foil ECFS Test Ceiling/ System: mm KSP Lignified ing 3.5 mm Standard IXPE Underlay (Light Green) ECFS Test 3 Ceiling/ System: mm KSP Lignified ing mm HD IXPE (Green) ECFS Test 4 Ceiling/ System: mm KSP Lignified ing mm ST Standard IXPE (White) ECFS Test 5 Ceiling/ System (Additional Testing): mm KSP Lignified ing ECFS 48 () () () LnTw+Ci () (-) 4 6. All testing results were compared to the acoustic rating tested with the bare concrete floor (Test ) and the improvement in LnTw rating is specified. The following are also noted: All tests were undertaken with mm thick concrete sub-base, 5 mm insulation batts fitted in 8 mm ceiling cavity and one layer of 3mm suspended plasterboard ceiling. The relation between Field Impact Isolation Class (FIIC) and Impact Isolation Class (IIC) can be described by the formula FIIC + 5 IIC. All the ceiling/floor system tested have also met the BCA 3 criterion (L ntw +Ci 6) for impact noise insulation. The lower the rating number the better the acoustic performance. The concrete slab is joined to the concrete wall which is a homogenous wall connecting from residential units on the upper floor level to the lower floor level. Ceiling/floor cavities without insulation batts will provide less impact insulation. It is expected that the acoustic performance will be worse by 5 rating points. Date: th May 5 Reference: 76C55mfcSchneidingAustralia 9

10 6. CONCLUSION Koikas Acoustics was requested by Schneid ing Australian Pty Ltd to undertake impact noise tests on ceiling/floor system with mm KSP Lignified ing and four (4) different types of underlay samples. The acoustic performances of various ceiling/floor configurations were calculated and compared against the acoustic requirements of the current BCA and AAAC star ratings. The calculated acoustic rating of each tested flooring sample was summarised and presented in Table of this report. Detailed graphically presentation of the acoustic performance of each tested flooring sample is attached as Appendix A. All tested flooring samples have complied with current BCA acoustic requirements and achieved AAAC Star Rating of 4. It is recommended that testing be conducted prior to any full fit-out as the sub-base ceiling floor system and the wall junctions can impact upon the resultant flanking noise in the unit below. The above report should be reproduced in full including the attached Appendix. Date: th May 5 Reference: 76C55mfcSchneidingAustralia

11 APPENDIX A A P P E N D I X A APPENDIX A

12 FIELD MEASUREMENTS OF IMPACT SOUND INSULATION OF FLOORS (TEST ) Date of T est : Thursday, 7 May 5 Project No. : 76 Testing Company : Koi kas Acoustics Checked by : Place of T est: Client Client Address Nick Koikas Residential Flat Unit i n Campsie Schneid in g Australia Pty Ltd Residential Flat Unit i n Campsie Name Thickness (mm ) Density (SI) Description mm KSP Lignified ing -- of mm Rubber Underlay with S ilver Foil -- mm concrete slab + 8 mm ceilin g cavity + 5 mm in sulation batts System 3 mm Pl asterboard ceil in g 3 -- Room Width : 3.5 m Length : 5.5 m Area : 9. 5 m Sample Width : m Length : m Area : m Room Surfaces Location Width Length Area Height Volume Walls Ceiling Receiver Rm Unit Plasterboard concrete Plasterboard Frequency L'nT (one-third octave) db f Sub Base Sub Base Sub Base Hz Underlay Standardised Impact Sound Pressure Level, L'nT, [db] Reference Line Sub B a se Sub- Base & Sub B a se, & Und erlay Frequency, f, [Hz] Sub Base Sub Base & Flo or Sub Base, & Underlay L'nT,w 6 AS ISO L'nT,w 48 AS ISO L'nT,w 48 AS ISO Ci - AS ISO Ci - AS ISO Ci AS ISO Ci(5-5 ) -9 AS ISO Ci(5-5 ) AS ISO Ci(5-5 ) AS ISO Ci(63- ) - AS ISO Ci(63- ) AS ISO Ci(63- ) AS ISO AAAC Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e FI IC 4 ASTM E7-4 FI IC 6 ASTM E7-4 FI IC 6 ASTM E7-4 Definitions of Noise Metrics 5 4 Improvement of Impact Sound Insulation FIIC: Field I mpact Insulation Class is a single-number rating of how well a floor system attenuates impact type sounds, such as footsteps. Calculated from third-octave band normalised impact sound pressure level data and referenced to m as described in ASTM E989. The hi gher the si ngle-number rating, the better i ts impact insulation performance. Impact Noise Reduction [db] Improveme nt of impact sou nd insulation delta L between (sub-b ase w ith underlay and fl oor covering) and (sub-base with floor covering) Improveme nt of impact sou nd insulation delta L between (sub-b ase w ith underlay and fl oor covering) and (sub- bas e) Third Octave Band, f, [Hz] L'nT,w: The Weighted Standardised Impact Sound Pressure Level when measured i n situ referenced to a reverberation time (RT6) of.5 seconds. Used by the AAAC to determi ne their respective Star Rating. Ci: Spectrum adaption term is a low frequency correction factor. Typically for massive fl oors such as concrete, the values are about zero while for timber joist floors Ci is positive because of the low resonant frequencies. Considers frequency range between -and 5 Hz. Ci(5-5): Same as above, but for the frequency range 5-5 Hz. Ci(5-): Same as above, but for the frequency range 5 - H z. AA AC Star R L'nT,w FIIC Comments Below BCA 6 Clearly Audible Audible Barely Inaudible Normally Inaudible

13 FIELD MEASUREMENTS OF IMPACT SOUND INSULATION OF FLOORS (TEST ) Date of T est : Thursday, 7 May 5 Project No. : 76 Testing Company : Koikas Acoustics Checked by : Place of T est: Client Client Address Nick Koikas Residential Flat Unit i n Campsie Schneid ing Australia Pty Ltd Residential Flat Unit i n Campsie Name Thickness (mm ) Density (SI) Description mm KSP Lignified ing -- of 3. 5 mm S tandard IXPE (Light Green) mm concrete slab + 8 mm ceiling cavity + 5 mm insulation batts System 3 m m Pl asterboard ceil in g 3 -- Room Width : 3.5 m Length : 5.5 m Area : 9. 5 m Sample Width : m Length : m Area : m Room Surfaces Location Width Length Area Height Volume Walls Ceiling Receiver Rm Unit Plasterboard concrete Plasterboard Frequency L'nT (one-third octave) db f Sub Base Sub Base Sub Base Hz Underlay Sub Base Standardised Impact Sound Pressure Level, L'nT, [db] Reference Line Sub Base Sub-Base & Sub Base, & Underlay Sub Base & Sub Base, & Underlay L'nT,w 6 AS I SO L'nT,w 48 AS I SO L'nT,w 47 AS I SO Ci - AS I SO Ci - AS I SO Ci AS I SO Ci( AS I SO Ci(5-5 ) AS I SO Ci(5-5 AS I SO Ci(63- - AS I SO Ci(63- ) AS I SO Ci(63- AS I SO AAAC Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e FI IC 4 ASTM E7-4 FI IC 6 ASTM E7-4 FI IC 6 ASTM E Frequency, f, [Hz] Definitions of Noise Metrics FIIC: 5 Improvement of Impact Sound Insulation Field I mpact Insulation Class is a single-number rating of how well a floor system attenuates im pact type sou nds, such as footsteps. Calculated from third-octave band normali sed im pact sou nd pressure level data and referenced to m as described in ASTM E989. The hi gher the single-number rating, the better its im pact insul ation performance. Impact Noise Reduction [db] Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub-base with floor covering) Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub- base) Third Octave Band, f, [Hz] L'nT,w: The Weighted Standardised Impact Sound P ressure Level when measured in s itu referenced to a reverberation time (RT6) of.5 seconds. Used by the AAAC to determine their respective Star Ci: Spectrum adaption term is a low frequency correction factor. Typicall y for m assive floors such as concrete, the values are about zero whil e for timber joist floors Ci is posi tive because of the low resonant frequencies. Considers frequency range between - Ci(5-5): Same as above, but for the frequency range 5-5 Hz. Ci(5-): Same as above, but for the frequency range 5 - Hz. AA AC Star R L'nT,w FIIC Below Clea rly Barely Normally Comments Audible BCA 6 Audible Inaudible Inaudible

14 FIELD MEASUREMENTS OF IMPACT SOUND INSULATION OF FLOORS (TEST 3) Date of Test : Project No. : 76 Testing Company : Koikas Acoustics Checked by : Place of Test: Client Client Address Description of System Thursday, 7 May 5 Nick Koikas Residential Flat Unit in Campsie Schneid ing Australia Pty Ltd Residential Flat Unit in Campsie Name Thickness (mm) Density (SI) mm KSP Lignified ing -- mm HD IXPE (Green) -- mm concrete slab + 8 mm ceiling cavity + 5 mm insulation batts mm Plasterboard ceiling 3 -- Room Width : 3.5 m Length : 5.5 m Area : 9.5 m Sample Width : m Length : m Area : m Room Surfaces Location Width Length Area Height Volume Walls Ceiling Receiver Rm Unit Plasterboard concrete Plasterboard Frequency L'nT (one-third octave) db f Sub Base Sub Base Sub Base Hz Underlay Standardised Impact Sound Pressure Level, L'nT, [db] Reference Line Sub Ba se Sub-Base & Sub Ba se, & Underlay Sub Base Sub Base & Sub Base, & Underlay L'nT,w 6 AS ISO L'nT,w 48 AS ISO L'nT,w 47 AS ISO Ci - AS ISO Ci - AS ISO Ci AS ISO Ci(5-5) -9 AS ISO Ci(5-5) AS ISO Ci(5-5) AS ISO Ci(63-) - AS ISO Ci(63-) AS ISO Ci(63-) AS ISO AAAC Star AAAC Guidleline AAAC 4 Star AAAC Guidleline AAAC 4 Star AAAC Guidleline FIIC 4 ASTM E7-4 FIIC 6 ASTM E7-4 FIIC 6 ASTM E Frequency, f, [Hz] Definitions of Noise Metrics FIIC: 4 Improvement of Impact Sound Insulation Field Impact Insulation Class is a single-number rating of how well a floor system attenuates impact type sounds, such as footsteps. Calculated from third-octave band normalised impact sound 34 pressure level data and referenced to m as described in ASTM 3 9 E989. The higher the single-number rating, the better its impact insulation performance. 4 L'nT,w: Impact Noise Reduction [db] The Weighted Standardised Impact Sound Pressure Level when measured in situ referenced to a reverberation time (RT6) of.5 seconds. Used by the AAAC to determine their respective Star Rating. Ci: Spectrum adaption term is a low frequency correction factor. Typically for massive floors such as concrete, the values are about zero while for timber joist floors Ci is positive because of the low resonant frequencies. Considers frequency range between and 5 Hz. Ci(5-5): Same as above, but for the frequency range 5-5 Hz. - Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub-base with floor covering) Ci(5-): Same as above, but for the frequency range 5 - Hz. Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub- base) AAAC Star R L'nT,w FIIC Third Octave Band, f, [Hz] Comments Below BCA 6 Clearly Audible Audible Barely Inaudible Normally Inaudible

15 FIELD MEASUREMENTS OF IMPACT SOUND INSULATION OF FLOORS (TEST 4) Date of T est : Thursday, 7 May 5 Project No. : 76 Testing Company : Koikas Acoustics Checked by : Place of T est: Client Client Address Nick Koikas Residential Flat Unit i n Campsie Schneid ing Australia Pty Ltd Residential Flat Unit i n Campsie Name Thickness (mm ) Density (SI) Description mm KSP Lignified ing -- of mm ST Standard IXPE (White) -- mm concrete slab + 8 mm ceiling cavity + 5 mm insulation batts System 3 m m Pl asterboard ceil in g 3 -- Room Width : 3.5 m Length : 5.5 m Area : 9. 5 m Sample Width : m Length : m Area : m Room Surfaces Location Width Length Area Height Volume Walls Ceiling Receiver Rm Unit Plasterboard concrete Plasterboard Frequency L'nT (one-third octave) db f Sub Base Sub Base Sub Base Hz Underlay Sub Base Standardised Impact Sound Pressure Level, L'nT, [db] Reference Line Sub Base Sub-Base & Sub Base, & Underlay Sub Base & Sub Base, & Underlay L'nT,w 6 AS I SO L'nT,w 48 AS I SO L'nT,w 48 AS I SO Ci - AS I SO Ci - AS I SO Ci AS I SO Ci( AS I SO Ci(5-5 ) AS I SO Ci(5-5 AS I SO Ci(63- - AS I SO Ci(63- ) AS I SO Ci(63- AS I SO AAAC Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e AAAC 4 Star AAAC Guidlelin e FI IC 4 ASTM E7-4 FI IC 6 ASTM E7-4 FI IC 6 ASTM E Frequency, f, [Hz] Definitions of Noise Metrics FIIC: 4 Improvement of Impact Sound Insulation Field I mpact Insulation Class is a single-number rating of how well a floor system attenuates im pact type sou nds, such as footsteps. Calculated from third-octave band normali sed im pact sou nd pressure level data and referenced to m as described in ASTM E989. The hi gher the single-number rating, the better its im pact insul ation performance. Impact Noise Reduction [db] Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub-base with floor covering) L'nT,w: The Weighted Standardised Impact Sound P ressure Level when measured in situ referenced to a reverberation time (RT6) of.5 seconds. Used by the AAAC to determine their respective Star Ci: Spectrum adaption term is a low frequency correction factor. Typicall y for m assive floors such as concrete, the values are about zero whil e for timber joist floors Ci is positive because of the low reson ant frequencies. Considers frequency range between Ci(5-5): Same as above, but for the frequency range 5-5 Hz. Ci(5-): Same as above, but for the frequency range 5 - Hz. Improvement of impact sound insulation delta L between (sub-base with underlay and floor covering) and (sub- base) AA AC Star R L'nT,w Third Octave Band, f, [Hz] FIIC 45 Below 55 Clea rly 6 65 Barely 7 Normally Comments Audible BCA 6 Audible Inaudible Inaudible