Beat
= Beat
{title2=$f_b=|f_1-f_2|$}
The slow change in the resultant <amplitude> when two nearby <frequencies> interfere. Two steady sinusoidal components at $f_1$ and $f_2$ produce successive amplitude maxima separated by $1/|f_1-f_2|$.
= Beat
{title2=$f_b=|f_1-f_2|$}
The slow change in the resultant <amplitude> when two nearby <frequencies> interfere. Two steady sinusoidal components at $f_1$ and $f_2$ produce successive amplitude maxima separated by $1/|f_1-f_2|$.