Launch Point

This week’s subject: Sound

What do sonograms, music and baby talk have in common? They are all produced by sound waves, which are created when any substance vibrates. Sounds can be used not only for communication, but also for navigating through the ocean or viewing parts of the body for medical diagnosis. Learn about what sound is, how hearing works and many uses of sound through the direct links on The Times’ Launch Point Web site. Go to:

https://www.latimes.com/launchpoint/