Abstract
The LIIC and HIIC dual-rating method has been developed to better evaluate the impact noise isolation of floor-ceiling assemblies. LoVerde et al. have argued that impact noise is characterized by two distinct frequency domains that can vary independently based on changes to an assembly. The LIIC rating addresses low-frequency impact noise and is calculated using the impact sound pressure levels in the 50, 63, and 80Hz 1/3-octave bands. The HIIC rating addresses high-frequency impact noise and is calculated using the impact sound pressure levels in the 400 to 3150 Hz 1/3-octave bands, inclusive. This presentation looks at the ability of the dual-rating method to compare the efficacy of a range of ceiling isolators from generic resilient channel to spring isolators using a set of laboratory tests conducted at the same laboratory on the same base floor/ceiling assembly. The results show that the dual-rating method can provide useful information for design decisions even when the test data is from a lab with a receiving room volume that is less-than-ideal for measurements at the low frequencies required for the LIIC metric.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
