Sound Transmission Class definition

Sound Transmission Class. (STC) means a one-number rating of the sound-blocking ability of a partition, door, window, etc., calculated in accordance with ASTM E413 from measurements of one-third-octave band sound pressure levels and sound absorption made in a laboratory and in accordance with ASTM E90.
Sample 1Sample 2Sample 3
Sound Transmission Class or “STC” means (laboratory) sound transmission class as set out in ASTM E90. STC is a single number that is an indication of an assembly’s ability to block sound (i.e. in the speech frequencies). The higher the STC rating, the higher is the sound transmission loss. For instance: loud speech can be understood fairly well through an STC 30 wall but should not be audible through an STC 60 wall;
Sample 1Sample 2

Examples of Sound Transmission Class in a sentence

  • Editor Note: Sound Transmission Class (STC) / Outdoor-Indoor Transmission Classification (OITC) performance varies depending on window type and whether standard or upgrade features are specified.

  • Editor Note: Sound Transmission Class (STC)/Outdoor Indoor Transmission Classification (OITC) performance varies depending on window type and features.

  • Editor Note: Sound Transmission Class (STC)/Outdoor-Indoor Transmission Classification (OITC) performance varies depending on window type and whether standard or upgrade features are specified.

  • A minimum Sound Transmission Class (STC) rating of 45 shall be achieved.

  • Editor Note: Sound Transmission Class (STC)/Outboard Inboard Transmission Classification (OITC) performance varies depending on patio door type and whether standard or upgrade features are specified.

  • Sound Transmission Class (STC) rating up to 30 for the entire assembly.

  • For developments that propose affordable units facing on and within 100 yards of road-ways with allowable speeds in excess of 35 miles per hour or other types of industrial or other noise must have windows facing these conditions that meet a 32 Sound Transmission Class (STC) rating standard for noise mitigation or greater.

  • Sound Transmission Class (STC) rating up to 30 for the curtain and up to 22 for the entire assembly.

  • When completed the SCIF must have an STC (Sound Transmission Class) rating of at least 45 (sound group 3).

  • Refer to the Glossary in this guidance for added explanations and definitions of acoustical terms such as STC (Sound Transmission Class) and NIC (Noise Isolation Class).

Related to Sound Transmission Class

  • Transmission line means any single or multiphase electric power line operating at nominal voltages at or in excess of either 69,000 volts between ungrounded conductors or 40,000 volts between grounded and ungrounded conductors, regardless of the functional service provided by the line.

  • Regional Transmission Enhancements means enhancements and expansions of the Transmission System that (1) a Regional Transmission Expansion Plan developed pursuant to Operating Agreement, Schedule 6 or (2) any joint planning or coordination agreement between PJM and another region or transmission planning authority set forth in Tariff, Schedule 12- Appendix B (“Appendix B Agreement”) designates one or more of the Transmission Owner(s) to construct and own or finance. Required Transmission Enhancements shall also include enhancements and expansions of facilities in another region or planning authority that meet the definition of transmission facilities pursuant to FERC’s Uniform System of Accounts or have been classified as transmission facilities in a ruling by FERC addressing such facilities constructed pursuant to an Appendix B Agreement cost responsibility for which has been assigned at least in part to PJM pursuant to such Appendix B Agreement.

  • Transmission pipeline means any high pressure transmission pipeline connected to, but excluding the Maui Pipeline, that is used for the open access transportation of Gas, and includes all items of plant, equipment, fixtures and fittings directly appurtenanced to that pipeline, but excluding any item which is controlled by a party other than that pipeline’s TP Welded Party and any low pressure distribution system.

  • Transmission Provider means any entity or entities transmitting or transporting the Product on behalf of Seller or Buyer to or from the Delivery Point.

  • Transmission Owner means a Member that owns or leases with rights equivalent to ownership Transmission Facilities and is a signatory to the PJM Transmission Owners Agreement. Taking transmission service shall not be sufficient to qualify a Member as a Transmission Owner.

  • Interregional Transmission Project means transmission facilities that would be located within two or more neighboring transmission planning regions and are determined by each of those regions to be a more efficient or cost effective solution to regional transmission needs.

  • Transmission Facilities shall have the meaning set forth in the Operating Agreement.

  • Network Transmission Service means transmission service provided pursuant to the rates, terms and conditions set forth in Tariff, Part III, or transmission service comparable to such service that is provided to a Load Serving Entity that is also a Transmission Owner.