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Nelson EducationSchoolPhysics 11 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Web LinksUNIT 3: WAVES AND SOUNDChapter 7: Properties of Sound Waves
7.2 Production and Transmission of
Sound Energy In-Flight Rotor Acoustics Program Page (242, #8 ) The NASA Ames laboratory's in-flight rotorcraft acoustics program reports on the techniques they use and the results of flight tests on various rotor aircraft. It does get into some details but has lots of information.
From Fermilab, this educational resource on sight and sound in nature review some of the features of feathers in barn owls that permit them to catch their prey. It includes other links and details on this topic in other natural systems.
TSI Inc. corporate Web site page that describes using laser diagnotics to observe the rotor wake of a hovering helicopter. Provides images and animation on the turbulance on different parts of the rotor. Smart Materials for Aerospace & Marine Applications Page (242, #8 ) This page on the corporate Web site of Continuum Dynamics Inc has an explanation on the types of materials and designs used for helicopter blades. Each link includes a brief explanation of the blade and some diagrams on the effects of these changes.
This is a 1997 NASA report on the effect of rotor design on noise reduction. Detailed and thorough. May require Adobe Acrobat Reader to view in PDF format. Corio Raptor Care: Birds of Prey Page (242, #9 ) Corio Raptor Care and Rehabilitation Center provides information on feathers and their role in flight, especially for raptors and birds of prey. The Barn Owl Restoration Project Page (242, #9 ) The Barn Owl Restoration Project provides this information on the design of owl feathers to permit silent flight. The site has many pictures and access to a web cam.
The Department of Veteran's Affairs US has produced this primer on audiology. It includes specifications and technical data on hearing aids as well as information on the testing used, the way we hear etc. A good reference site. Hearing Aids and How They Work Page (254, #5 ) A page on Hearing USA's Web site that describes many of the details of hearing aids and how they work. It includes a section on the history of the device and some of the latest developments. Siemens: Digital Hearing Aids Page (254, #5 ) Siemens corporate site with this section on the hearing aids produced by the company. There are specification and photos for the newest hearing aids. It also has an educational section on how we hear sound, how do hearing aids work and the difference with hearing with one ear or two ears.
Methods in applied Marine Geology and automated interpretation of seismic sections Page (275, #32 ) From the University of Gotborg Earth Sciences Department, this is a detailed report on Methods in applied Marine Geology and automated interpretation of seismic sections. It discusses various types of sounders and their uses. Some parts of the report may require Adobe Acrobat Reader.
Triton Elics International's Web site providing this resource on the application of reflection semisic devices on seafloor research and investigation. Production and Geological Implications of Natih 9-C, 3-D Seismic Survey Page (275, #32 ) The Society of Exploration Geophysicists has produced this pdf file on 3D seismic survey and geologic interpretation of Natich 9-C. It includes graphs and other diagrams and charts providing an idea of the applications of sound waves in oil and gas exploration.
Forty Years of Space Heritage Page (275, #34 ) From Motorola, this site describes the devices used by astronauts to communicate. Clicking the history button on the bottom of the page will reveal more detailed information.
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