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distance. In fact, I realized that the only way I

was going to be able to isolate the sound of my

humming completely from the speaker output

and resonant kazoo body was to completely

eliminate the distance between mouth and

microphone — I decided to literally put the

microphone inside my mouth!

To make this possible, I wrapped the

INMP441 in soft foam to dampen the sound a

bit, and then 3D printed an enclosure (Figure

A

) to go around that to keep my drool out.

Note that I am using PETG and hot glue for the

enclosure but I don’t recommend putting either

of those things in your mouth.

• The trick: It turns out that if you stick a

microphone in ...