The Binaural Beats Quiz

Which term describes the auditory illusion perceived by the brain when two slightly different frequencies of sound are played into each ear?

What causes the volume to pulse (oscillate) at a fixed rate when listening to binaural beats?

What is the rate (frequency) of a beat equal to?

What is the frequency of the beat if the two frequencies being played are 200 Hz and 210 Hz?

Which example illustrates a similar phenomenon to binaural beats?

What are Binaural Beats?

Why does the volume pulse with binaural beats?

What determines the beat's rate?

Beat frequency with 200 Hz and 210 Hz?

Analogy for Binaural Beats?

The auditory illusion perceived by the brain when two slightly different frequencies of sound are played into each ear is called binaural beats.
The volume of binaural beats pulses (oscillates) at a fixed rate because the two frequencies interfere with each other. When the waves are in phase, they add together resulting in a louder sound. When they are out of phase, they cancel each other out, resulting in a quieter sound.
The rate (frequency) of a beat is equal to the difference between the two frequencies. This means that the volume of the binaural beat will pulse at the rate of the difference between the two frequencies played into each ear.
If the two frequencies being played are 200 Hz and 210 Hz, then the frequency of the beat is 10 Hz.
A similar phenomenon to binaural beats is the Moiré pattern, which is a visual illusion caused by the superposition of two patterns. This pattern is created by the interference of two sets of parallel lines with slightly different angles.