acustica

=Sunetul= Tipuri de sunete: http://www.3m.co.uk/intl/uk/3MStreetwise2008/flash/sound_vibrates.swf Chitara: http://www.hotfrets.com/tuner.swf Cum se propaga sunetul: http://www.harcourtschool.com/activity/science_up_close/521/deploy/interface.html Carcateristici sunet: Intensitate si frecventa: http://illuminations.nctm.org/ActivityDetail.aspx?ID=37 Perceptia sunetelor; Simulare ureche: http://science.education.nih.gov/supplements/nih3/hearing/activities/lesson1.htm Sa identificam sunete: http://www.crickweb.co.uk/assets/resources/flash.php?&file=sound1f

Vocea de Heliu si vocea de Xenon
 * Sunetul si Heliul**