ASTM E90 Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
ASTM E90 test method is part of a set for evaluating the sound-insulating properties of building elements. It is designe d to measure the transmission of sound through a partition or partition element in a laboratory.... Read More
Average 30% Cost Savings
100% Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
TRUSTED BY ENGINEERS FROM
ASTM E90 Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
ASTM E90 test method is part of a set for evaluating the sound-insulating properties of building elements. It is designed to measure the transmission of sound through a partition or partition element in a laboratory.
Scope:
ASTM E90 test method covers the laboratory measurement of airborne sound transmission loss of building partitions such as walls of all kinds, operable partitions, floor-ceiling assemblies, doors, windows, roofs, panels, and other space-dividing elements.
Test Procedure:
In ASTM E90, two adjacent reverberation rooms are arranged with an opening between them in which the test partition is installed (Figure 1). The only significant sound transmission path between rooms is by way of the test partition. An approximately diffuse sound field is produced in one room – the source room. Sound incident on the test partition causes it to vibrate and create a sound field in the second room – the receiving room. The space- and time-averaged sound pressure levels in the two rooms are determined. In addition, with the test specimen in place, the sound absorption in the receiving room is determined. The sound pressure levels in the two rooms, the sound absorption in the receiving room, and the area of the specimen are used to calculate sound transmission loss. Because transmission loss is a function of frequency, measurements are made in a series of frequency bands.
In theory, it is not important which room is designated as the source and which is the receiving room. In practice, different values of sound transmission loss may be measured when the roles are reversed. To compensate for this, the entire measurement may be repeated with the roles reversed; the source room becomes the receiving room and vice versa. The two sets of transmission loss values are then averaged to produce the final result for the ASTM E90 test.
Figure 1: Illustration Showing Conceptual Arrangement of a Wall Sound Transmission Loss Suite
Figure 2: Illustration Showing Filler Wall and Test Specimen that is Smaller Than the Test Opening
Specimen size:
The test specimen used in ASTM E90 testing may either be built into a suitable frame, which is then inserted in the test opening, or built into the opening itself. Specimens shall be built in accordance with usual construction practice except that extra control procedures may be necessary to ensure maintenance of the specified dimensions.
Data
In ASTM E90, the sound transmission loss at each frequency f is calculated using the formula:
TL (f) = LS(f) – LR (f) +10 log S/AR(f)
Where:
TL (f) = transmission loss, dB,
LS (f) = average sound pressure level in the source room, dB,
LR (f) = average sound pressure level in the receiving groom, dB,
S = area of the test specimen that is exposed to the receiving room, m2, and
AR (f) = sound absorption of the receiving room with the test specimen in place, m2
When measurements are made in both directions, the final value of transmission loss to be reported shall be calculated using:
TL (f) = (TL1 (f) – TL2 (f))/2
Where TL1 (f) and TL2 (f) correspond to the two directions of measurement.
If TL1 (f) or TL2 (f) is invalid (for example, because of excessive background noise) then the remaining valid measurements shall be used for TL (f).
Conclusion:
ASTM E90 test method covers the laboratory measurement of airborne sound transmission loss of building partitions such as walls of all kinds, operable partitions, floor-ceiling assemblies, doors, windows, roofs, panels, and other space-dividing elements.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
STEP 01
You share material and testing requirements with us
STEP 02
You ship your sample to us or arrange for us to pick it up.
STEP 03
We deliver the test report to your email.
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Guaranteed confidentiality
Quick turnaround time
Hassle-free process
Let us combine our capabilities to achieve success!!