Abstract
Fiber-metal materials are available which can provide virtually any acoustical resistance in the form of thin, strong, formable and joinable sheets. Manufacturing procedures are described briefly. The mechanical, thermal, and fatigue properties of the materials, in both aluminum and stainless steel, are described insofar as these properties are known. Also, the tradeoffs relating to weight, strength, and cost are presented, along with a discussion of material design options and limitations. Within the acoustical-flow resistance range of 10–60 cgs Rayl, produceability limitations are reviewed statistically in terms of sheet thickness and flow-resistance tolerances. The effect of particle velocity on flow resistance is described, showing that the resistance increases owing to turbulent flow at equivalent sound-pressure levels (SPL) above 140 dB. Finally, the effect of flow-resistance variations on impedance-tube absorption characteristics is discussed, considering again the range of 10–60 cgs Rayl. The major unresolved question is the effect of very high SPL's on absorption characteristics.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
