Set-up of the circuit using the breadboard

Error that contributes to uncertainties

Three main errors:

1. Sensitivity of microphone

2. Noises from speaker

3. Resistance of circuit

There are some errors that contribute to the uncertainty, for example, the microphone is not sensitive enough, so we need to speak louder and cover the microphone with hands in order for the microphone to detect the signals. To improve this, we can use a better microphone.

Also, the sound from the speaker is not really clear and has noises. This is because not just laser light, but many other light sources from the environment reach the solar panel, which contributes to the noises. To improve this, we can use filter to cancel out the noise.

In addition, there is extra resistance throughout the entire circuit. To improve this part, we can use less wire. Also, we can take the resistance of the circuit into account when we do the calculations to obtain a more accurate result.

Is the criteria of success fulfilled?

YES!!

We successfully build a working laser communicator, and prove that sound and light synchronized with each other. Also, the graphs show that the light intensity is proportional to the sound pressure amplitude square, and as sound pressure amplitude increases, the induced current also increases. Lastly, we were able to make a computational model that shows how sound waves are in 3 dimensional space. Therefore, these match with what we expected before.

Input vs. Output frequencies