Model No:SPH-S009
Study beats and determine the frequencies of two tuning forks
When two sound waves of slightly different frequencies travel in the same direction and interfere with each other, they produce periodic reinforcement and cancellation of sound. This audible rise and fall in volume is called a beat.
When two tuning forks vibrate simultaneously, their sound waves alternately reinforce and cancel each other, producing periodic variations in sound intensity. This phenomenon provides a practical demonstration of wave interference and the principle of superposition. By counting the number of beats heard per second, students can experimentally determine the frequency difference between the two forks and establish their individual frequencies.
Contents:
Aim : Study or demonstrate the principle described by the experiment or apparatus name: Study beats and determine the frequencies of two tuning forks.
Specifications: The apparatus comprises a pair of tuning forks with slightly different natural frequencies, designed to produce clearly audible beats when sounded together. The tuning forks are made from durable metal to provide stable vibrations and consistent acoustic performance. The experiment allows students to observe periodic changes in sound intensity, measure the number of beats within a given time interval, and determine the frequency difference between the two tuning forks. The precise frequency values, dimensions, and supplied accessories depend on the model provided.
|
Trial |
Beats counted |
Time (s) |
Beat frequency (Hz) |
|---|---|---|---|
|
1 |
20 |
10 |
2.0 |
|
2 |
21 |
10 |
2.1 |
|
3 |
19 |
10 |
1.9 |
|
Mean |
20 |
10 |
2.0 |
For a reference tuning fork of 256 Hz the other fork may have a frequency of 254 Hz or Hz depending on the observed frequency relationship.
