2024年12月3日 · IIC ratings assess how well floor-ceiling assemblies reduce impact noise. Impact sounds include footsteps, objects dropping on the floor or furniture moving. Standardized tests measure the IIC rating to determine how well floors insulate sound.

There are a number of factors that determine the Impact Insulation Class, or IIC, of your floor-ceiling assembly. These include the finish floor, the substrate, and the ceiling system below, in addition to your choice of sound mat or soundproofing underlayment. Use our IIC Calculator below to determine what IIC your flooring system achieves.

2021年3月5日 · IIC stands for Impact Insulation Class. This is the rating given to flooring assemblies and determines how well they mitigate impact noise (footfall mostly). As opposed to STC, IIC rates the flooring assembly as a whole, not just the material on its own. The different parts of a flooring assembly can include:

IIC stands for impact insulation class. Acoustic labs conduct the IIC test using a tapping machine with steel faced hammers. These hammers strike a test floor material generating sounds between 125 to 4,000 Hz. The impact creates vibrations that travel through the floor into the receiving side (the room below).

2025年3月26日 · IIC, or Impact Insulation Class, measures how well a floor dampens impact noise—think footsteps, dropped tools, or kids jumping—also scored from 0 to 100. An IIC of 55 means those upstairs thuds soften enough to keep downstairs livable, not a war zone. Impact noise is different—it’s physical vibrations hitting a surface, not just air waves.

The IIC uses the same test procedure that determines INR. This is a single figure rating for sound insulation. The floor-ceiling test results are all positive, with the highest numbers having the best sound insulation. A simple way to determine an estimate of IIC results from INR results is to add 51 to the INR result.

IIC stands for impact insulation class. Acoustic labs conduct the IIC test using a tapping machine with steel faced hammers. These hammers strike a test floor material generating sounds between 125 Hz to 4,000 Hz. The impact creates vibrations that travel through the floor into the receiving side (the room below).

2017年10月5日 · IIC stands for "Impact Insulation Class", the degree of soundproofing of the impact noise of a floor/ceiling assembly in a laboratory. The higher the IIC, the better the acoustic insulation. This measurement index, obtained by standardized acoustic tests, is done in a laboratory where the testing and site conditions are controlled.

2016年2月5日 · Impact Insulation Class (IIC) is a rating commonly used to evaluate a floor/ceiling partitions ability to resist structure-borne impact sound transfer (i.e., walking, shuffling). Standardized field apparent insulation class (AIIC) testing is conducted in the field whereby a standard tapping machine is placed on the floor of the source room, in ...

IIC values can range from as low as 25 for lightweight residential construction with no floor covering to over 65 for commercial construction with carpet. More typical values fall between 35 and 55. For multi-family structures, some codes require an IIC of 50 or more when tested in the laboratory (or 45 or more when tested in the field).