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Electronics Science Fair Project

Speaker Size and Frequency Response

Hard
Speaker Size and Frequency Response | Science Fair Projects | STEM Projects
Ever wondered how the size of a speaker enclosure affects the sound it produces? In this project, you'll build three different speaker enclosures of different sizes and measure the decibel reading of various audio frequencies.

Hypothesis

The hypothesis is that reducing the size of the speaker enclosure will cause the dB of some frequencies to be higher compared to the rest of the frequencies.

Method & Materials

You will construct three speaker enclosures of different sizes using plywood, glue, and nails. You will then connect the speakers to a CD player and measure the decibel reading of various audio frequencies using a decibel meter.
You will need plywood, glue, nails, a drill, saw, decibel meter, CD player, and a test CD with various audio frequencies.

Results

The results showed that the frequency response of the two larger speakers did not go beyond the 0 dB level, but the smallest speaker produced some frequencies that were louder than the others. This type of air tight speaker enclosure is called a sealed enclosure and can produce more precise sound.

Why do this project?

This science project is interesting because it shows how the size of a speaker enclosure can affect the sound it produces.

Also Consider

Experiment variations could include checking the frequency response using different types and thickness of wood for the enclosure, or using different sizes of speakers.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

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