Quantity   Component name
1 × 1/8" x 12" x 12" acrylic
2 × 1/8" x 12" x 12" birch plywood
1 × Arduino UNO any microcontroller will do
1 × Breadboard Electronic Components / Misc. Electronic Components
1 × Electret microphone
1 × Ultrasonic sensor HC-SR04
30 × 4-40, 3/8" socket head screw