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.
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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;
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Examples of Sound Transmission Class in a sentence

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

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

  • 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.

  • 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.

  • For example, for an asymmetric thrust reverser extension to result in the left yawing moment recorded by the accident airplane’s FDR during the first several seconds of the upset, the right engine would have had to have been in forward thrust and the left engine in reverse.

  • 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.

  • Sound Transmission Class (STC) (ASTM E413): Provide glazing required for conforming to over all STC ratings as specified for aluminum windows.

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

  • All exterior windows having a line of sight of a Major or Secondary Highway shall be constructed with double-pane glass and use exterior wall construction which provides a Sound Transmission Class (STC) value of 50, as determined in accordance with ASTM E90 and ASTM E413, or any amendment thereto.

Related to Sound Transmission Class

  • Transmission links are the means used for inter-connecting distributed units for the purpose of conveying signals, operating data or an energy supply. This equipment is generally electrical but may, in some part, be mechanical, pneumatic or hydraulic.

  • Transmission Injection Rights means Capacity Transmission Injection Rights and Energy Transmission Injection Rights. Transmission Interconnection Customer:

  • Transmission Loading Relief means NERC’s procedures for preventing operating security limit violations, as implemented by PJM as the security coordinator responsible for maintaining transmission security for the PJM Region.

  • 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.

  • Transmission Facility means a facility for transmitting electricity, and includes any structures, equipment or other facilities used for that purpose as defined in the Parties respective XXXXx.

  • 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.

  • Merchant Transmission Facilities means A.C. or D.C. transmission facilities that are interconnected with or added to the Transmission System pursuant to Tariff, Part IV and Tariff, Part VI and that are so identified in Tariff, Attachment T, provided, however, that Merchant Transmission Facilities shall not include (i) any Customer Interconnection Facilities, (ii) any physical facilities of the Transmission System that were in existence on or before March 20, 2003 ; (iii) any expansions or enhancements of the Transmission System that are not identified as Merchant Transmission Facilities in the Regional Transmission Expansion Plan and Tariff, Attachment T, or (iv) any transmission facilities that are included in the rate base of a public utility and on which a regulated return is earned. Merchant Transmission Provider:

  • 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.

  • Qualifying Transmission Upgrade means a proposed enhancement or addition to the Transmission System that: (a) will increase the Capacity Emergency Transfer Limit into an LDA by a megawatt quantity certified by the Office of the Interconnection; (b) the Office of the Interconnection has determined will be in service on or before the commencement of the first Delivery Year for which such upgrade is the subject of a Sell Offer in the Base Residual Auction; (c) is the subject of a Facilities Study Agreement executed before the conduct of the Base Residual Auction for such Delivery Year and (d) a New Service Customer is obligated to fund through a rate or charge specific to such facility or upgrade.

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

  • Energy Transmission Injection Rights means the rights to schedule energy deliveries at a specified point on the Transmission System. Energy Transmission Injection Rights may be awarded only to a Merchant D.C. Transmission Facility that connects the Transmission System to another control area. Deliveries scheduled using Energy Transmission Injection Rights have rights similar to those under Non-Firm Point-to-Point Transmission Service.

  • 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. Transmission Owner Attachment Facilities:

  • Merchant Transmission Provider means an Interconnection Customer that (1) owns, controls, or controls the rights to use the transmission capability of, Merchant D.C. Transmission Facilities and/or Controllable A.C. Merchant Transmission Facilities that connect the Transmission System with another control area, (2) has elected to receive Transmission Injection Rights and Transmission Withdrawal Rights associated with such facility pursuant to Tariff, Part IV, section 36, and (3) makes (or will make) the transmission capability of such facilities available for use by third parties under terms and conditions approved by the Commission and stated in the Tariff, consistent with Tariff, Part IV, section 38. Metering Equipment:

  • Transmission Service means Point-To-Point Transmission Service provided under Tariff, Part II on a firm and non-firm basis.

  • 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. Transmission Injection Rights:

  • Transmission Licensee means any person who is authorised by a Transmission Licence to transmit electricity, acting in that capacity;

  • Central Transmission Utility means the Government Company notified by the Central Government under Sub-Section (1) of Section 38 of the Electricity Act, 2003.

  • P.01 Transmission Grade of Service (“GOS”) means a trunk facility provisioning standard with the statistical probability of no more than one call in 100 blocked on initial attempt during the average busy hour.

  • Financial Transmission Right or “FTR” shall mean a right to receive Transmission Congestion Credits as specified in Operating Agreement, Schedule 1, section 5.2.2 and the parallel provisions of Tariff, Attachment K-Appendix, section 5.2.2.

  • Incremental Rights-Eligible Required Transmission Enhancements means Regional Facilities and Necessary Lower Voltage Facilities or Lower Voltage Facilities (as defined in Tariff, Schedule 12) and meet one of the following criteria: (1) cost responsibility is assigned to non-contiguous Zones that are not directly electrically connected; or (2) cost responsibility is assigned to Merchant Transmission Providers that are Responsible Customers.

  • CTU or Central Transmission Utility means the Central Transmission Utility as defined in Sub-Section (10) of section (2) of the EA-2003.

  • Transmission License means the license granted by the Appropriate Commission in terms of the relevant regulations for grant of such license issued under The Electricity Act, 2003;

  • 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.

  • Regional Transmission Organization or “RTO” means the regional transmission organization approved by the Federal Energy Regulatory Commission for the control area that includes the utility’s assigned service area (as defined in IC 8-1-2.3-2).

  • Network Integration Transmission Service means the transmission service provided under Tariff, Part III.