While tuning his violin the violinist compares the pitch his string produces to the pitch produced by an electronic tuner if the tuner produces a note with a frequency of 440 hz and the violine plays a note with a frequency of 443 hz what is the beat frequency produced?

3 Hz

Explanation:

A beat is the pattern of interference among two waves with frequencies which are different.

The difference of the frequencies of the waves gives us the beat frequency.

Here, one frequency is , the other frequency is

So, the beat frequency

The beat frequency that is produced is 3 Hz