To find out, he borrowed a standard technique from architectural acoustics and built a scaled-down model. The tallest replica stones are approximately two feet high. Cox and his co-workers based the model on laser scans of Stonehenge that were provided by Historic England, the government agency responsible for preserving historic sites, as well as the latest archaeological thinking about the different construction phases and configuration of the original stones.
To create replicas, he 3-D-printed 27 of the stones. Then he made silicon molds of them and cast the other 130 stones. Some of the model stones were hollow plastic; cavities were filled with aggregate and plaster mix. The others were cast using a plaster-polymer-water mix. Gaps were filled with children’s modeling clay. All the replica stones were sealed with a cellulose car spray paint to prevent sound from being absorbed. Once the model was complete, he began experimenting with microphones and speakers, and measuring sound waves with a computer.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.