ISO140-9
A technique for measuring the sound insulation of building components, particularly for figuring out the impact sound insulation of floors, is provided by ISO 140-9. This is essential for evaluating how well floor assemblies, especially in multi-story buildings, can reduce the amount of sound that travels from one space to another.
Use of ISO140-9:
Impact Sound Insulation Assessment: Architects, engineers, and acoustic consultants use this method to assess how well floor plans reduce impact noise from things like footsteps or dropped objects.
Product development and certification: Flooring products and assemblies are tested and certified by manufacturers using ISO 140-9 to make sure they satisfy certain impact sound insulation requirements.
Regulatory Compliance: In order to satisfy regional building codes and sound insulation regulations, adherence to ISO 140-9 is frequently required.
Method of ISO140-9:
Test Configuration:
A floor assembly that divides two rooms—a source room, where the impact sound is produced, and a receiving room, where the sound is measured—is used in the test.
To reduce interference from outside noise, the test needs to be carried out in a controlled laboratory setting.
Method of Measurement:
Impact Sound Generation: In the source room, a standardized impact source is dropped onto the floor, such as a falling mass (typically a weighted hammer). To guarantee uniformity, the mass and drop height are specified.
Data collection: To record the sound levels produced by the impact, microphones are positioned in the receiving room. As the impacts happen, measurements are made concurrently.
Sound Level Analysis: During the impact events, recordings are made of the sound levels in the receiving room.
Analyzing Data:
The floor assembly’s ability to reduce impact sound is indicated by a single number rating (Ln,w) for impact sound insulation.
Frequency-dependent data is usually included with results to enable a thorough evaluation of performance at different frequencies.
In order to improve the acoustic comfort and quality of both residential and commercial buildings, ISO 140-9 is crucial for making sure that floor assemblies offer sufficient insulation against impact sound.