Budget

Microphone

POM-3535L-3-R by PUI Audio, Inc.

10 Pack $16.25 ($1.62 ea.) - Digi-Key Electronics

Has a frequency range of 20 Hz to 16 kHz

Used to capture the sound/frequency data from the diamond on the scathe and the diamond polishing machine for analysis with Arduino. The signal is put through the microphone amplifier and input into the Arduino via pin 13, where the Arduino displays the instantaneous frequency through the display. The data is also saved via third party software, Cool Term.