Two sound waves of nearly same frequency are travelling in the same direction and interfere to produce a regular waxing (maximum) and waning (minimum) in the intensity of the resultant sound waves at regular intervals of time is called beats.
It two vibrating bodies have slightly difference in frequencies, beats can occur.
No. of beats can be heard ∆υ = υ1 ∼ υ2
Importance : 1. It Importance : can be used to tune musical Instruments
2. Beats are used to detect dangerous gases.
Explanation for tuning musical instruments with beats : Musicians use the beat phenomenon in tuning their musical instruments. If an instrument is sounded against a standard frequency and tuned until the beats disappear then the instrument is in tune with the standard frequency.
