Acoustical Noise Study for the 18,000 BTUH Total Environmental Control System.
Abstract
The purpose of this task was to determine the sound pressure levels of the 18,000 BTUH Total Environmental Control System (TECS) and to compare these levels with standard sound criteria. The sound pressure levels were measured with the TECS installed in an S-141 Shelter as well as under free field conditions. The criteria for the evaporator side of the installed equipment are found in MIL-STD-1474, Noise Limit Category E. All measured pressure levels were below the Category E limit by a substantial margin. The criteria for the condenser side of the equipment for an 8-hour exposure without hearing protection are found in MIL-STD-1474, Noise Limit Category D. Again, all measured pressure levels were below the criteria limit by a substantial margin.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1974
- Accession Number
- ADA023851