The waveform has been updated to repeat twice in the available time, making it twice as fast.
Periodic waveforms repeat to produce a constant tone.
Frequency is a measure of how many times the waveform repeats in a given amount of time.
Frequency is measured in Hertz (Hz), which represents the number of repetitions per second.
The waveform graph shows a 1-second interval, so the wave is oscillating at 2Hz.
Frequency is similar to "pitch"; the faster a wave repeats, the higher the pitch.
Not all sound is periodic; white noise is just a uniform distribution of audible frequencies.
A singer's throat vibrates at a certain frequency to produce a specific pitch.
Physical objects that make noise hundreds or thousands of times a second have a discernable pitch.
Pitch can be heard in everyday objects like car engines, hand mixers, and drills.

Test your knowledge of waveforms and frequencies with this quiz! Learn about the basic principles of periodic waveforms, frequency measurements, and how pitch is related to the speed of a waveform. From white noise to a singer's throat vibrations, this quiz will cover it all. See if you can identify the pitch in everyday objects and understand the science behind sound production.