A student is using a frequency generator set to 440 Hz. Another student has an identical generator playing an unknown frequency.

Question

Nimfa-mama [501]

3 years ago

15

A student is using a frequency generator set to 440 Hz. Another student has an identical generator playing an unknown frequency.

When both sounds are playing, the student hears a 'beat' with a frequency of 2Hz. What would the unknown frequency be

Physics

1 answer:

Anna71 [15] · Answer 1 · 2022-01-04T17:38:02+03:00

Answer:

The unknown frequency is either 438 Hz or 442 Hz.

Explanation:

The frequency of a beat heard when two sounds with frequencies f₁ and f₂, are played simultaneously, is simply the difference between two frequencies.

b = |f₁ - f₂|

b = 2 Hz

f₁ = 440 Hz

f₂ = ?

440 - f₂ = 2 or 440 - f₂ = -2

f₂ = 438 Hz or 442 Hz

The unknown frequency is either 438 Hz or 442 Hz.

Hope this Helps!!!