DESIGN, DEVELOPMENT AND CONSTRUCTION OF A FLUID ACOUSTIC FILTER
Abstract
Various devices employed to attenuate noise borne by flowing gas were evaluated as attenuators of noise borne by flowing water. Experiment indicates that expansion chambers offer higher attenuations of fluid-borne sound, at least across the important 20-1000 c band width, than gas theory would predict. We believe that further experimentation will disclose that the dynamics of flow within and through an expansion chamber, not acknowledged by the gas theory, can be controlled to provide even greater and broader-band attenuations than those obtained in the experiments reported herein. For this reason, and because expansion chambers inherently are more compact, less costly, and require less maintenance than the other devices considered, we recommend that their development be pursued. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1960
- Accession Number
- AD0260934
Entities
People
- A.w. Starbird