ISO140-8
A specific laboratory setup is used in the ISO 140-8 standard to measure the airborne sound insulation of building components. In order to ensure consistency and dependability in the results, this section focuses on evaluating the sound insulation performance of components like walls and floors under controlled conditions.
Use of ISO140-8:
Architects, engineers, and acousticians use acoustic performance evaluation to gauge how well building components attenuate the transmission of airborne sound.
Product Development and Certification: Using this standard, producers test and certify their goods to make sure they satisfy certain sound insulation requirements.
Regulatory Compliance: Assists in making sure that assemblies and building materials adhere to national and international sound insulation building codes.
Method of ISO140-8:
Preparing the Sample:
A wall or floor, for example, is built to precise measurements and installed in a way that best suits its intended purpose.
To avoid sound leaks that might skew the measurements, it should be properly sealed.
Environment for Testing:
A source room, where sound is produced, and a receiving room, where sound is measured, are usually used in the controlled laboratory environment where the tests are carried out.
The surroundings should reduce outside noise and guarantee precise sound transmission measurements.
Method of Measurement:
Sound Generation: In the source room, a sound source (like a loudspeaker) continuously produces a noise signal, usually pink noise.
Data collection: To concurrently record sound pressure levels, microphones are placed in the source and receiving rooms.
Level Comparison: By measuring the sound levels in the two rooms, it is possible to compare the sound levels before and after they have passed through the building element.
Analyzing Data:
The difference between the sound levels recorded in the source and receiving rooms is used to compute the sound transmission loss (TL), which is commonly stated in decibels (dB).
A thorough summary of the element’s performance at various sound frequencies can be obtained by presenting the results as a function of frequency.
For residential, commercial, and institutional buildings to improve acoustic comfort and privacy, building elements must successfully reduce airborne sound transmission, which is made possible by ISO 140-8.