440 Hz and 220 Hz waves with microphone probes

Sound waves are longitudinal or compression waves that transmit sound energy from the source of the sound to an observer....

A standing wave is the combination of two waves that are moving in opposite directions. Standing waves are typically formed...

In this activity, students play different kinds of sounds near a computer’s microphone and watch the resulting visual display created...

In this investigation, students use simple equipment to measure the wavelength of sound waves and calculate the speed of sound....