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The Sound Reduction Index is expressed in decibels (dB). It is the weighted sound reduction index for a partition or single component only. This is a laboratory-only measurement, which uses knowledge of the relative sizes of the rooms in the test suite, and the reverberation time in the receiving room, and the known level of noise which can pass between the rooms in the suite by other routes ...
Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used.
The European Standard EN 62262 — the equivalent of international standard IEC 62262 (2002) — relates to IK (impact protection) ratings. [1] This is an international numeric classification for the degrees of protection provided by enclosures for electrical equipment against external mechanical impacts.
Sika AG is a Swiss multinational specialty chemical company that supplies to the building and motor vehicle industries, headquartered in Baar, Switzerland. The company develops and produces systems and products for bonding, sealing, damping, reinforcing and protecting.
Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size.
iso 1 – iso 1999; iso 2000 – iso 2999; iso 3000 – iso 4999; iso 5000 – iso 7999; iso 8000 – iso 9999; iso 10000 – iso 11999; iso 12000 – iso 13999;
AMCA Publication 511 - Certified Ratings Program - Product Rating Manual for Air Control Devices describes the certification procedures under which the AMCA International Certified Ratings Seal is granted for sound, air performance, air leakage, water penetration and wind driven rain for air control products.
ISO 2006-1:2009 Part 2: Moderate-speed method under load; ISO 2007:2018 Rubber, unvulcanized — Determination of plasticity — Rapid-plastimeter method; ISO 2008:1987 Rubber latex, styrene-butadiene — Determination of volatile unsaturates [Withdrawn without replacement] ISO 2009:2011 Slotted countersunk flat head screws — Product grade A