AVIXA Recognized AV Technologist Test

What is the definition of "frequency"?

1. The cycle when molecules move from rest through compression to rest to rarefaction

2. The physical distance between two points of a waveform

3. The intensity or loudness of a sound in a particular medium

4. The number of times a complete cycle occurs per second

The correct answer is: The number of times a complete cycle occurs per second

The definition of "frequency" refers to how frequently a periodic event occurs in a given timeframe. It specifically pertains to the number of times a complete cycle of a waveform, such as a sound wave, is completed in a second, measured in hertz (Hz). For instance, if a sound wave cycles from one peak to the next in one second, its frequency is one hertz. This concept is critical in audio and acoustics because it directly correlates to the pitch of a sound; higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Understanding frequency is essential when dealing with audio equipment, as it affects how sounds are produced, transmitted, and perceived. The other options, while related to sound and wave behavior, do not accurately define frequency. The first option describes the behavior of sound waves during a cycle, the second one refers to wavelength, which is the distance between two points of a waveform, and the third option deals with sound intensity rather than frequency.