ISO140-11

The process for determining the airborne sound insulation of building components using in situ measurements is described in ISO 140-11. In contrast to a controlled laboratory setting, this standard focuses on evaluating the sound insulation performance of components like walls and floors under actual conditions.

Use of ISO140-11:

Architects, engineers, and acousticians use acoustic performance evaluation to gauge how well building components reduce airborne sound transmission in real-world construction situations.
Regulatory Compliance: Assists in making sure that sound insulation in residential and commercial buildings complies with building codes and regulations.
Quality assurance: Offers a way to confirm that building assemblies function as intended in practical situations.

Method of ISO140-11:

Test Configuration:

Two adjacent spaces that are divided by the building element under evaluation—such as a wall or floor—are used for the measurement.
The test is carried out in a building setting that closely mimics normal usage circumstances.

Method of Measurement:

Sound Generation: In the source room, a controlled noise signal—typically pink noise—is produced by a sound source, such as a loudspeaker.
Data collection: To record sound levels simultaneously, microphones are positioned in the source and receiving rooms. While the sound source is operational, measurements are made.
Level Comparison: To ascertain the amount of sound that has been transmitted through the building element, the sound levels in the two rooms are recorded.

Analyzing Data:

The difference in sound levels between the source and receiving rooms—usually measured in decibels (dB)—is used to compute the airborne sound insulation.
Frequency-dependent data may be included in the results, enabling a thorough evaluation of the element’s performance at different sound frequencies.

To improve acoustic comfort and privacy in a variety of settings, including homes, workplaces, and public areas, ISO 140-11 is essential for precisely evaluating the sound insulation performance of building elements under actual conditions.