About UsContact UsOrder Information Site MapRep LocatorCareers

Web Links

UNIT 3: WAVES AND SOUND

Chapter 7: Properties of Sound Waves

7.2 Production and Transmission of Sound Energy
7.5 The Human Ear
Chapter 7 Review

 

 

 7.2 Production and Transmission of Sound Energy

Hovering Helicopters Rotor Wake   Page (242, #8 )

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.

A Study of the Effect of Blade Shape on Rotor Noise   Page (242, #8 )

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.

7.5 The Human Ear

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.

Chapter 7 Review

Oil Exploration  Page (275, #32 )

This site from the Texas State Historical Association gives some background on the history of oil exploration.

Fossils into Fuels: Discovering and extracting crude oil and gas  Page (275, #32 )

The SchoolScience Web site includes a unit about turning fossils into fuel. This part of the site summarizes how crude oil and gas are discovered and extracted from below the Earth's surface.

Atlantic Oil & Gas Works Online  Page (275, #32 )

Atlantic Oil and Gas Works Online maintains this Web site that includes this informative article about how seismic waves are used to discover oil and gas.

Sounds Travel   Page (275, #34 )

A University of Leicester website descibing the basic physics of sound movement and sound waves. Links at the bottom of the page provide more details.

Space Educator's Handbook: The Spacesuit  Page (275, #34 )

From NASA, this page details the development of the spacesuit. There is a brief mention of how communication is achieved between astronauts. Use this as a start to your research.