For those interested in the technical details of the Clapper's clap detection, the patent the article links to [1] is definitely worth taking a look at. Not only does it feature detailed explanations and flowcharts of the algorithm, but page 13 even has a full source code listing of the firmware that runs on the Clapper's ST6210 microcontroller - which, in true "there's a 6502 inside every toy" fashion, has a very blatantly 6502-inspired architecture [2].

[1] https://patents.google.com/patent/US5493618A

[2] https://www.st.com/en/microcontrollers-microprocessors/st621...