Quantity   Component name
1 × teensy 3.2 main uController, https://www.pjrc.com/store/teensy32.html
1 × teensy propshield this shield has a 2watt amplifier that I'm using to broadcast audio through a small speaker.... https://www.pjrc.com/store/prop_shield_lowcost.html
1 × teensy audio shield the audio shield has an SD card that holds the audio files... https://www.pjrc.com/store/teensy3_audio.html
1 × 200g accelerometer I used a 200g accelerometer to get accurate hit data... you could easily use a cheaper accelerometer if you are not interested in accuracy... https://www.adafruit.com/product/1413
1 × small generic speacker
1 × nodeMcu I'm using a nodeMcu (esp8266) to post the accelerometer data to data.sparkfun.com to see how BIG the hits are... http://tinyurl.com/zph7gz6