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### College Physics (Urone)

Book edition 1st Edition
Author(s) Paul Peter Urone
Pages 1272 pages
ISBN 9781938168000

# A car has two horns, one emitting a frequency of 199 Hz and the other emitting a frequency of 203 Hz. What beat frequency do they produce?

The beat frequency produced by the two horns is 4 Hz.

See the step by step solution

## Step 1: Introduction

We calculate beat frequency of two horns as we know that beat frequency is modulus of difference of two frequencies.

## Step 2:  Given parameters and formula for beat frequency

Frequency of first horn $$= 199 Hz$$

Frequency of second horn $$= 203 Hz$$

Beat frequency $$f = \left| {{f_1} - {f_2}} \right|$$

Here,

$${f_1},{f_2}$$ - frequency of 2 sources.

$$f$$- beat frequency.

## Step 3:  Calculate beat frequency

Beat frequency of two horns is

\begin{align}{}f &= \left| {{f_1} - {f_2}} \right|\\f &= \left| {199 - 203} \right|Hz\\f &= 4Hz\end{align}

Therefore, the beat frequency produced by the two horns 4Hz.