Transmission Loss Test of an AK Series XO Aluminium Fixed/Slide Secondary Door
Duo-Tec Winsulation
Testing Requirement
The National Acoustic Laboratories was commissioned by the Company to measure the acoustical transmission loss of an AK series XO sliding aluminium door configured with one fixed and one sliding sash. The door was installed in a 2087mm high x 1982mm wide frame with timber reveals stapled to the full perimeter. This timber frame in turn was mounted in an opening 2180mm high x 2025 mm wide in a “filler” wall.
Signatory Peter Alway, Manager Acoustical Test Facilities 5th November, 1997
Results
A complete set of measurements and calculations for determination of the test sample acoustical transmission loss was calculated and is presented numerically and graphically on the appended spreadsheets.
A summation of one-third octave transmission loss results is as follows:
Note 1: Determination of Sound Transmission Class for a test sample requires comparison of its transmission loss with a series of values for each transmission class rating listed in the STC tables at each one third octave band centre frequency, 125Hz to 4000Hz. The correct Sound Transmission Class (STC) rating determined by these tables is reached when either or both of the following requirements are met:
a. The test sample transmission loss at any frequency in the range 125Hz to 4000Hz must not lie more than 8dB below that of the STC graph.
b. The total sum of the test sample values lying below the STC graph values at the same frequencies must not add to more than 32dB.
Note 2: Refer to the spreadsheet summaries (attached) for deciBel precision at the 95% confidence level for each frequency. The uncertainties have been calculated on the basis of there being not more than five chances in one hundred that any value differs from the true value by more than the stated uncertainty.
Sound transmission class of the AK Series XO aluminium frame sliding door with 6.52mm lamgard glass Duo-Tec system spaced 100mm apart, was obtained by a series of calculations according to the equations detailed on pages 4 and 5 of this report. The rating determined was STC38.
REPORT ATF446
Transmission Loss Test of an AJ Series XO Window With one Fixed Pane and one Sliding Sash
Duo-Tec Winsulation
Testing Requirement
The National Acoustic Laboratories was commissioned by the Company to meaure the acoustical transmission loss of an AJ series XO sliding aluminium window fitted with one fixed pane and one sliding sash and tested as a primary window within a 1886mm high x 1380mm wide opening in the "filler" wall. The aluminium window itself was fitted inside a 1845mm high x 1338mm wide timber outer frame with timber reveals stapled to the full frame perimeter. The window was installed and tested in sideways configuration but this will not degrade acoustical performance.
The two panel primary window frame was glazed with 6.52mm lamgard glass (two 2mm glass panes with 1.52 lamination). The sliding pane was fitted with Schlegel Qlon foam weatherseals and "speaker" foam was inserted in the drain holes. A Duo-Tec system consisting of two sliding sashes spaced 100mm from the primary window was installed as a secondary window. Ordinary pile weatherseals were fitted to these sashes. Acoustic tiles were fitted to the inside surfaces of the reveals between the two windows.
Determination of the sound transmission class rating of a window requires measurement of the acoustic transmission loss of a specially designed wall. This wall is constructed within, and "fills" the test aperture between two reverberation rooms at the National Acoustic Laboratories acoustical test facility.
A second measurement is taken of the Acoustical transmission loss of the window fitted in an opening in the wall. The difference between these two measurements provides a means of calculating the Sound Transmission Class (STC) rating of the window itself.
The "filler" wall was constructed using fyrcheck plasterboard, was tested as ATF435 and achieved a transmission sound class rating of STC81. Inspection of the installed window for acoustical sealing integrity was carried out to ensure that it had been installed correctly and was fully closed.
The wall was then tested with the window installed and the combination achieved a rating of STC51. All measurements were carried out according to the methods and procedures outlined in AS1191 - 1985 "Acoustics-Method for the laboratory measurement airborne sound transmission loss of building partitions".
Sound transmission class of the 6.52mm lamgard glass, AJ series, XO two panel aluminium frame window with one panel sliding and the other fixed and with a double sliding sash, Duo-Tec system spaced 100mm apart was obtained by a series of calculations according to the equations detailed on pages 4 and 5 of this report. The rating determined was STC45.
Date of test: 22nd October 1997
Signatory Peter Alway, Manager Acoustical Test Facilities 4th November, 1997
Results A complete set of measurements and calculations for determination of the test sample acoustical transmission loss was calculated and is presented numerically and graphically on the appended spreadsheets.
A summation of one-third octave transmission loss results as required by AS1191 - 1985 is as follows:
Note 1: Determination of Sound Transmission Class for a test sample requires comparison of its transmission loss with a series of values for each transmission class rating listed in the STC tables at each one third octave band centre frequency, 125Hz to 4000Hz. The correct Sound Transmission Class (STC) rating determined by these tables is reached when either or both of the following requirements are met:
a. The test sample transmission loss at any frequency in the range 125Hz to 4000Hz must not lie more than 8dB below that of the STC graph
b. The total sum of the test sample values lying below the STC graph values at the same frequencies must not add to more than 32dB.
Note 2: Refer to the spreadsheet summaries (attached) for deciBel precision at the 95% confidence level for each frequency. The uncertainties have been calculated on the basis of there being not more than five chances in one hundred that any value differs from the true value by more than the stated uncertainty.
Sound transmission class of the 6.52mm lamgard glass, AJ series, XO two panel aluminium frame window with one panel sliding and the other fixed and with a double sliding sash Duo-Tec System, spaced 100mm apart was obtained by a series of calculations according to the equations detailed on pages 4 and 5 of this report. The rating determined was STC45.
Date of test: 22nd October 1997
Signatory Peter Alway, Manager Acoustical Test Facilities 4th November, 1997
Date of test : 24th October 1997
Signatory Peter Alway, Manager Acoustical Test Facilities 5th November, 1997
